Psychology professor Jackie Strelitz thinks she’s over Harlan Crispin, her ex-lover and colleague. Why should she care if Harlan springs a new “friend” on her? After all, Jackie has everything she ever wanted: a loving husband and a thriving career. Still, she can’t help but be curious about Harlan’s latest. Nasira Amari is graceful, smart, and appallingly young. Worse, she’s the newest member of Jackie’s research team. For five years, Harlan enforced rules limiting his relationship with Jackie. With Nasira, he’s breaking every single one. Why her? Fixated by the couple, Jackie’s curiosity becomes obsession. But she soon learns that nothing is quite what it seems and that to her surprise—and peril—she may not be the only one who can’t let go.