A workaholic adult woman's imaginary childhood friend returns to her, but ends up being more of a troublemaker than a great companion.

Alice, a hardworking independent woman, is all grown up, but when she faces a challenge, her childhood friend comes back to help her through her fears of intimacy and children. The problem: Alice is the only one who can see this blast from the past, Imaginary Mary--who doesn't see things eye-to-eye with her.