A thirtysomething woman's life turns to chaos when an imaginary friend she created as a child returns after she begins dating a divorced father with three kids.

When Ben asks Alice to help him with her first mom-like task to pick up Bunny from dance class, Mary quickly discovers the simplest parental tasks are fraught with difficulty. Afterwards, Ben is disappointed when Alice tells him she can’t help with the kids anymore, but things change when Andy enlists Alice’s help to overcome his fear of taking a driving test.