The crew of the submarine Sea Serpent and the submarine itself are taken by a strange winged man to the year 24,999, where a war is going on between the winged men and gigantic fishmen living under the sea. The winged men want the crew of the Sea Serpent to destroy the fishmen with their submarine, the only thing capable of going under water and destroying the city of the fishmen.
In addition to its stand-alone volume, this title was published in the follow books. It can be rated independently of any volumes containing it.
