Sejin works at one of the most renowned flower shops in the capital. But his interest is not in horticulture, but to seek revenge on Junghoo Choi, the owner of a fancy high-end salon. Sejin believes that Junghoo is responsible for the death of Doyoung whom he loved. As a mere flower shop assistant, he cannot directly go after Junghoo, so he decides to use Kyuryeon, Junghoo's closest confident, to achieve his goal. But one day, arrogant playboy Kyuryeon starts coming onto Sejin and offers Sejin a deal. Should Sejin win him over by the time the glasshouse he commissioned is built, he will help Sejin get what he wants, even if it means the death of his friend. A fatal game of love and romance begins between the two. Will Sejin be able to seek retribution for his old love and free himself from guilt and shame?