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Seo Yi-do arrives at Dong-hwa’s isolated house to carry out an assassination. Before he can finish the mission, his boss Choi Mu-geon changes the order and tells him to hold Dong-hwa captive instead.

The uneasy cohabitation continues. Tae-jeong’s warm personality slowly breaks through Yi-do’s guarded attitude, while Yi-do struggles to maintain his false identity.

Suspicion inside the house increases as Tae-jeong begins noticing inconsistencies in Yi-do’s story. Dong-hwa’s mysterious financial troubles and hidden secrets start coming to light.

The thriller elements intensify. Tae-jeong proves he is more observant than Yi-do expected, while clues about corruption and past crimes connect all three men together.

Seo Yi-do and Chu Tae-jeong as suspicion and attraction intensify between them. While Tae-jeong gets closer to uncovering hidden truths, Yi-do struggles between protecting his secrets and protecting the man he is beginning to love.

Seo Yi-do’s boss realizes he is becoming emotionally attached to Chu Tae-jeong and sends another killer to eliminate him.

Seo Yi-do’s hidden identity and the corruption conspiracy begin to fully unravel.

Seo Yi-do is forced to make his final choice between completing his mission and protecting Chu Tae-jeong.