Samuel and Woo Jin are having a hard time finding a new target. One night, a couple gets into Samuel's cab, and it seems like they are having an affair. Samuel and Woo Jin try to maintain their relationship when they see the couple passionately making love. They think they have succeeded in robbing them of money. "But Samuel had an accident while running away.

Woo Jin goes to the hospital and Samuel is not in bed. It turns out that Samuel is with Min Soo, his neighbor and cleaning friend in the past. Woo Jin calls him and catches him lying. He decides to follow him to see what's going on.

Woo Jin thinks about his relationship with Samuel and tries to figure out when and where everything started to go wrong. Feeling betrayed, he decides to blackmail the woman next door. Woo Jin interrogates Samuel, and Samuel tells him the secret he's been keeping. Woo Jin is confused, and that leads to big fight. What will this couple end up like?