Like any other genuine intergalactic space hero delivering sixteen million bags of first-class mail to the outer edges of the universe, Commander Zack Proton needed a potty break. But when Zack opened the wrong door and tumbled out of his ship, he found himself all alone in the inky depths of space...until he was picked up by Omega Chimp, the last chimpanzee sent into space. Zack was hoping to be found by a space hero like himself, but a chimp with a banana generator is going to have to do.

While searching for his lost ship, Zack and Omega square off with the evilest, nastiest, most horriblest space giant ever to walk the spaceways -- Big Large! Can Zack manage without his decoder ring? Does Omega Chimp have anything useful aboard his ship besides bananas? And how will a hunk of junk that's bigger than a breadbox, smaller than an ostrich, and looks like a chubby fire hydrant save the day?