Seventeen-year-old Jules Edwards always thought he was ordinary-until a viral news broadcast and a DNA test unravel everything.

Kidnapped as a baby, Jules is forced to leave behind the only life he's ever known and return to a family of strangers: the middle-class, grief-stricken Rosemarys, still mourning the son they've just lost—Jules's identical twin, Jack.

Suddenly, Jules is living in Jack's shadow. He's sleeping in his dead brother's room. Dodging his ex-girlfriend. Inheriting his friends and routines—and navigating a media circus that dubs him Rosemary Boy. But behind the carefully constructed facade, nothing feels right. His new stepfather watches him too closely. His biological siblings seem to be walking on eggshells. And the Rosemarys, once a media sensation, have retreated into silence.

Then there's Jasmine

Beautiful, aloof and strangely hostile—who captivates Jules from the moment he sees her at Jack's funeral. As Jules digs deeper into Jack's life and the pain he left behind, he begins to question not just who he is, but whether the life he lost was ever really his.