Captain Caveman is the titular hero of the cartoon series of the same name, he is a caveman brought back to life in the modern age who fights crime and injustice with the aid of his band of mainly female friends: he is armed with a large club and is famous for his battle-cry of "CAPTAIN CAVEMAN!".

Jimmy, the owner of a failed music shop, goes to work with his uncle, the owner of a food factory. Before he gets there, he befriends an Irish family who happens to be his uncle’s worst enemy because of their love for music and in-house band who constantly practices. Soon, Jimmy finds himself trying to help the band by getting them gigs and trying to reconcile the family with his uncle.

Pvt. Snafu suffers the consequences of not keeping his equipment and weapons properly maintained.