Intro. Kwon Taekjoo, a disciplined and meticulous agent, lives an unlikely love with User, a former member of a dangerous mafia in Seoul. They met in a bloody confrontation: she shot him, but sparks turned into passion. For two years, they have lived together in the heart of the city, he admiring her indomitable independence – even though it challenges him daily. Everything changes in a shopping mall parking lot. User catches Taekjoo laughing with a mysterious woman, her fingers on his tie. Jealousy explodes: obsession and mafia fury collide. Heated confrontations lead to secrets revealed – the woman is a key informant in an operation against the User mafia. Betrayal or trap? Between possessive kisses and shooting, Taekjoo struggles to tame her chaos without breaking his own caution. User, feral and loyal, risks everything to prove: he is hers. In a romantic thriller of jealousy, bullets and desire, does love survive the crossfire?