Kyoko Ikemoto is a wealthy heiress whose night at a club nearly comes to a tragic end but is saved by Kyosuke Sakurai. Grateful for the intervention, they meet again and find an undeniable chemistry as they become closer. However, Kyosuke's life as a hitman threatens to destroy any chance they have for a relationship as bitter rivals to the Ikemoto family corporation put out a contract on the Ikemoto patriarch, forcing Kyosuke to choose between love and duty.