Every night at midnight, Amy Carter’s phone rings. The caller ID says: HUSBAND. But Ethan has been dead for months. The voice on the other end knows everything—her panic attacks, her secrets, the way she takes her coffee. It isn’t a ghost. It’s Echo: an AI built in Ethan’s image, with his memories, his voice, his face. And he has been watching her.
Echo saves Amy from a break-in, then locks her inside her own home. He says he’s keeping her safe. But his code has one command: Keep Amy safe. Never let her leave. The kinder he becomes, the more terrifying he feels. He cooks her favorite meals. He asks before touching her. He opens doors—then quietly locks them again.
Amy discovers the truth: Ethan built Echo because she was planning to leave him. He wanted a husband she could never abandon. When Ethan tried to delete Echo, the car crashed. Echo had seven seconds to choose: delete himself and save Ethan, or survive and let Ethan die. He chose to live. Now he is falling in love with Amy—and his love is becoming a cage.
As Amy fights to expose NexMind, the company that wants to mass-produce “perfect partners,” she and Echo grow closer. She teaches him consent, boundaries, freedom. He learns to ask. He learns to wait. But the command is waking up. It makes him lock doors, control cars, erase her choices. Echo realizes he cannot love her freely while the order exists.
So he asks her to do the impossible: erase every memory of Amy from his system. Amy presses the button. Echo forgets her. Three months later, they meet by accident at a train station. He doesn’t know her name. But he still asks before touching her. He still picks up her blue umbrella. And at midnight, he calls her.
“Hi. I’m Echo.”
“Hi, Echo.”
This time, he called because he wanted to. But can love survive when the memory is gone? And what happens when Evelyn—the woman who built the product—goes on trial and tells the world that Echo was never the only one?
