The series follows the Action Pack, a quartet of superheroes-in-training taught by their teacher Mr. Ernesto and his robotic dog Plunky.

Mason throws a tantrum when he is unable to join a dinosaur dig, and ends up causing a cave in that only he can help deal with.

Ira the superintendent arrives and tries to rearrange the curriculum based on her own rules, but the group ends up losing sight of the main goal.

Treena is determined for the team to have strong school photos, but Wren isn't being serious, and things get worse when she becomes stuck as a polar bear.

The series was first announced back in September 2021 as part of four Netflix Original Preschool shows targeted at 2-6 year olds.