When a three-and-a-half-year-old boy tells a school psychologist that his mother is not his real mommy, he seeks the help of a police captain who's reluctant to take on the case as she's already occupied by a major robbery investigation.

The story follows the Morels, including two teenagers and a 7-year-old kid who are driving their parents out of their minds. One morning, they all wake up inside each other's bodies.