Michael Raynar is in love with his young wife and expecting his first child. His story should end with "happily ever after" but it doesn't. Instead he runs into Kimmy Sardell. Despite his better judgment, they have a one-night stand that places him on a path of devastating consequences. When Michael's pregnant wife disappears, the police put him through hell. Two years later he is still grieving his loss when he runs again into Kimmy. Since that night spent together, he lost a wife and child and Kimmy has a beautiful playful daughter, Eden. When Michael begins to notice things about Eden that remind him of his wife, he doesn't have to dig deep to discover a deranged side of the woman he now loves. Eden's life hangs by a thread, a thread Kimmy is ready and willing to cut.
Agents J (Will Smith) and K (Tommy Lee Jones) are back...in time. J has seen some inexplicable things in his 15 years with the Men in Black, but nothing, not even aliens, perplexes him as much as his wry, reticent partner.
Jill Parrish is trying to rebuild her life after surviving a terrifying kidnapping attempt. Though she is having a difficult time, she takes small steps toward normalcy by starting a new job and inviting her sister, Molly, to move in with her.