Mega City's superhero Captain Atomic suffers a setback, as he is shaking hands with 12-year-old[2] fanboy Joey Felt, his disgruntled sidekick Mookie (or Sergeant Subatomic) transforms him into a living sock puppet.

The suddenly powerless superhero quickly realizes that the only way he can regain his former powers is to team up with the boy—a dream come true for Joey, but not so much for Captain Atomic.

[43] According to Mercury Filmworks president Clint Eland, Atomic Puppet was envisioned as a comedic superhero-driven show focused on the close friendship between the main duo of Joey Felt and AP.

Coyle and Williams both added that the show also intended to explore various genres, allowing the series to exhibit a wide range of tones and emotions.

She praised its premise as fresh, unique, and entertaining, and its execution as making for a fun, humorous, and interesting take on the "old-school" superhero dynamic of the hero and his young sidekick.

Emily Ashby of Common Sense Media gave this the show rate three stars out of five, describing it as "lighthearted buddy comedy is filled with fast-paced action and humor that's just right for grade-schoolers' liking."