The overall title for two stories. "Moby Dick" (Segment 1). The exploits of Moby Dick, the legendary white whale, as he struggles to protect his human foundlings, Tom and Tub, from danger. "The Mighty Mightor" (Segment 2). The story of Tor, a young boy who possesses the power to change his meek self into the Mighty Mightor, a hero of unparalleled power. Episodes depict his battle against the evils of a savage era.