Superspeed, incredible strength, a foul mouth-these are thirty-one-year-old superhero Birdie Bowden's powers. Although Birdie boasts a perfect save record as Chicago's municipal super, her bad attitude and latest, now viral, run-in with a local menace lead the mayor to place her on suspension.

Forced into therapy in a small beachside suburb, the solitary Birdie meets eccentric, bubbly housekeeper Evie. Adrift without her job, Birdie leaves her superhero identity behind and accepts Evie's invitation to stay with her for the summer cleaning beach cabins while working the therapy program as a means to get her job back. The only snag in her plan is Aiden, Evie's ill-tempered, unfairly handsome brother and cabin owner. Focused on helping his sister wage her own battle of healing, Aiden finds Birdie to be an irksome, unwelcome influence and doesn't hesitate to tell her so. But that's fine with Birdie-her natural ability to constantly get a rise out of grumpy Aiden may be her greatest superpower yet.

As Birdie fumbles through her therapist's ridiculous get-to-know-the-real-Birdie assignments, she feels a growing connection to her new life, including the increasingly alluring Aiden, and a yearning for more than being a super. But she can't have both lives, and she'll never reveal her true identity-because the only thing faster than her own speed is how quickly people, particularly men, leave when they realize Birdie is not your typical heroine.