When law student Cass Walker wakes up after surviving a car accident, she is flooded with memories of her boyfriend, Devin. The only problem? Devin doesn’t exist. But everything she remembers about him feels so real, like the precise shade of his coffee-brown eyes; the texture of his favorite hand-me-down scarf; even the slightly crooked angle of his pinkie, broken after falling off a trampoline in third grade. She knows he’s a figment of her imagination—friends, family, and doctors confirm it—but she still can’t seem to get him out of her head.

So when she runs into the real Devin a year later in a Cleveland flower shop, she’s completely shocked. Even more surprising is that Devin actually believes her story, and soon they embark on a real-life romance. With her dream man by her side and an upcoming summer job at a prestigious law firm, Cass’s future seems perfect. But fate might have other plans…