When Leon brings a mystery egg home from school, Cat Ninja and Master Hamster face their biggest challenge yet: babysitting! And while they're pretty sure they can keep an egg out of trouble, they know they're in over their heads when that egg hatches into a high-energy ball of feathers and cuteness. It's baby's first superhero adventure when they decide to bring their newest family member along as they uncover the identity--and nefarious motives--of Metro City's latest foe.

Through the shared adventures of these former adversaries, kids learn the importance of:

- Using your powers--super or not!--to stand up for those who need your help
- Family, in all its forms
- Second chances