Erin Carter is an ordinary young woman from a poor background, working at a fast-food restaurant. She has spent her life in the shadow of her twin sister, Bella, who has a mole on her left cheek. Bella has nothing either, but her jealousy has turned into an obsession: she wants to take everything Erin has.
One rainy night, an exhausted Erin meets Kane at a bar. He is drunk, too, having just escaped a mob hit. With neither of them thinking clearly, they spend a reckless night together. Erin accidentally leaves behind her necklace with its engraved employee ID tag, which Kane gives to his five-year-old daughter, Leah, for safekeeping.
Months later, Leah uses the employee number on the tag to track Erin down at the restaurant. She keeps coming back, determined to get Erin and Kane married. To make Leah happy, the two agree to a marriage of convenience: they will pretend to be husband and wife, sleep in separate beds, stay out of each other’s lives, and part ways when the agreement ends.
After the marriage, Kane repeatedly finds himself caught in mob shootouts and assassination attempts. His hand-to-hand fights and gun battles nearly expose his true identity, but quick-thinking Leah always finds a way to cover for him. Erin remains completely unaware. Meanwhile, Bella notices Kane’s wealth and decides he is her ticket out of poverty. Joining forces with her closest friend, she uses every dirty trick she can think of to drive Erin into a corner.
At the wedding, Bella takes Erin’s place as the bride, crushing what little hope Erin has left. Erin escapes and, after unexpectedly giving birth to a son, Ethan, resolves to protect him at any cost. She learns hand-to-hand combat and firearms from a mysterious mentor, then lies low for three years before making a powerful return.
Now agile, fearless, and in command of her own life, Erin confronts her scheming sister and the friend who betrayed her. She also helps Kane survive one mob conflict after another. The fast-food worker who once let others control her fate becomes a woman strong enough to stand beside a mob boss on equal terms—and Kane finds himself falling deeply in love with her.