35 year old bachelor Jehan and his partner in crime Priyantha try to exploit the loopholes in the law in order to make a living.Koombiyo tells the story of Jehan Fernando, who has neither family nor home and lives alone in an abandoned building complex in Colombo. He accidentally meets Hiruni and Priyantha Mahaulpathagama in a public bus when Priyantha is coming to Colombo on his search for a job. Jehan convinces Priyantha to abandon the job he is going for and join Jehan's company Purchasing Lanka instead, which delivers retail items to customers claiming they are from supermarkets when in reality they are bought from the local flea markets. Priyantha starts living with Jehan while being a partner in his business and they quickly become good friends.
Episode 1
Roaming in the busy streets of Colombo Jehan (Thumindu) observes what seems to be a mob chase. Priyantha (Kalana), on the way to a new job, gets an unexpected offer. The two ends up in a place which seems to be the base of operations of an emerging enterprise
Episode 2
Jehan starts working with his new partner in crime, on his own business and Priyantha trying to understand the real side of the Jehan's Business.
Episode 3
Jehan's ploy backfires as one of his clients complains to the local police; and the client turns out to be an old friend.
Episode 4
Jehan and Priyantha lost their business and looking forward to a new business.
Episode 5
Jehan and Priyantha are up for another con. Jehan decides to sell his "positive thinking" to the people in need.
Episode 6
Jehan puts together a team of vagabonds, trains them to sell his product, and faces numerous challenges.
Episode 7
The magazine becomes successful, and Jehan meets one of his old subjects again
Episode 8
Jehan, "the innocent robber" turns out to be a mastermind connected with a local thug, Austin. He hands over a job to him to steal a luxury car. The magazine business is lost due to a clash between sellers and a bus conductor.
Episode 9
Jehan executes his mastermind plan to steal the car. It works out perfectly. Jehan decides to visit Priyantha's village until the situation cools back to normal in the town.
Episode 10
Jehan and Priyantha travel to "Mahaulpathagama" with newly bought clothes and gifts for family members. Priyantha meets his crush in the village, "Sudu Nangi".
Episode 11
Jehan and Priyantha come Back to Colombo from Mahaulpathagama when Jehan receives a mysterious call from a past friend about an issue with her family
Episode 12
A secretary of high powered official comes to visit Jehan with a new problem. In the meantime, Anjana, Jehan's Old friend, and Priyantha make a plan to set Jehan up with a girl.
Episode 13
Jehan prepares for his next plan against a media personnel. But the secreatary is unwilling to corporate with Jehan and his tactics in this plan.
Episode 14
Jehan and Priyantha go ahead with their plan for Mr. Padmakumara, the journalist. In the meantime, love between Jehan and Hiruni continues to grow.
Episode 15
Jehan continues his plan agains Padmakumara with the help of a new adversary. Jehan goes to meet with Adhikari, the secretary of Maldeniya, to discuss about the plan. Adhikari doubts Jenhan's plan against Padmakumara. Frustrated Jehan leaves angrily and complains to Austin and Tiran about Adhikari
Episode 16
Jehan successfully completes his plan against Padmakumara.
Episode 17
Adhikari is ecstatic about Jehan's game against journalist Padmakumara. After the end of another master plan, Jehan decides to prank on Priyantha.
Episode 18
Jehan meets Hiruni after a while but immediately gets into trouble.
Episode 19
Returning from hospital, Jehan is met with couple of members of a political group. Jehan is surprised to learn about their connection to his past con work. Leader of the political group presents Jehan a new job Meanwhile Jehan plans a surprise B'day celebration for Hiruni but ends up getting into trouble again.
Episode 20
Jehan gets into trouble after planning the surprise b'day party for Hiruni. Tiran has to come in to save Jehan.
Episode 21
Tiran takes Jehan and Priyantha to Austin's place where they experience the brutal nature of the gangster. Jehan reveals the past about Tiran and Austin to Priyantha.
Episode 22
As instructed by the leader of the political group, Jehan plans his next con and set his sights on Shakya Holdings.
Episode 23
Tiran comes to visit Jehan and talk about Hiruni. Priyantha goes for an interview at Shakya Holdings as part of Jehan's big plan.
Episode 24
After breaking up with Hiruni, Jehan again focus on Shakya Holdings. Jehan receives an unexpected call and a visit from CID officer ASP Abeysekara, who is investigating a bank robery connected to the gangster Austin
Episode 25
Jehan meets with Austin and Tiran to inform about his encounter with ASP Abeysekara. Meanwhile Jehan prepes Priyantha for his first day at the new job at Shakya Holdings
Episode 26
Jehan meets the leader of the "Eksath Kamkaru Pakshaya" Mr. Senadhi Tennakon to discuss about his plan against Shakya holdings. In the meantime Priyantha tries to fond loopholes at Shakya Holdings as instructed by Jehan
Episode 27
No overview available.
Episode 28
No overview available.
Episode 29
No overview available.
Episode 30
No overview available.
Episode 31
No overview available.
Episode 32
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Episode 33
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Episode 34
No overview available.
Episode 35
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Episode 36
No overview available.
Episode 37
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Episode 38
No overview available.
Episode 39
No overview available.
Episode 40
No overview available.
Episode 41
No overview available.
Episode 42
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Episode 43
No overview available.
Episode 44
No overview available.
Episode 45
No overview available.
Episode 46
No overview available.
Episode 47
No overview available.
Episode 48
No overview available.
Episode 49
No overview available.
Episode 50
Tiran uncovers the association of Jehan and Beral Sunil. The plot twists after Jehan explains his involvement in the Austins murder as well as masterminding a long con though his plan and Tiran's fate was not explained.
Episode 51
No overview available.
Episode 52
No overview available.
Episode 53
When Jehan is kidnapped by Tiran due to he(Tiran) has known that Jehan has played a role in his master Austin Aiyya's death. But successfully Jehan survives himself fro Tiran's gun with the help of Barrel Sunil.
Episode 54
No overview available.
Episode 55
Jehan begins to reveal his four years Master Plan for minister Maldeniya to unite with "Labourers Party" to become Prime Minister in Sri Lan
Episode 56
The revelation of the Jehan the gamer's plan that how the journalist Padmakumara was restrained from creating a polluted article about Maldeniya and how he used his spies to kneel down the "Labourers Party".
Episode 57
Jehan Reveals the all of the Details of his Master plan, where it all ends. (Series Finale) and for a new beginning.
