Mandy Cohen has two dogs, Bellamy and Leo. They look, play, and even smell (Ew!) like regular dogs. Or so Mandy thinks. One night, Mandy wakes up from a deep sleep in the middle of the night. Mandy calls for her mom, but she doesn't come, which is strange. So she decides to walk downstairs to her kitchen by herself, only to find her two dogs coming into the house through the backdoor dressed like superheroes, with masks and capes! Mandy is in shock when Bellamy and Leo start to talk to her. They plead with her to not tell anyone in fear that they will be taken to the evil scientist.

She vows to keep the secret and not tell a single person, including her parents! But then everything goes south when her dad finds her talking to the dogs the next day... Was it real? Does Mandy's dad hear what she says? How is this even possible? Do they have powers? What is their mission? What happens if Mandy's dad finds out?

For the parents, this book teaches kids of service animals. On the last page, you can read a few basic tips on how to help educate your child when they see a service dog (superhero pet) at work.