Young sea voyagers sailing to the New World are captured by Space Beings to be trained as officers in the alien Red Fleet.
The three young seafarers, Rooney, Mop and Billy, and their physician/father have set out with high hopes on the long ocean journey to the New World. But soon their hopes for a new life in that faraway land seem lost.
Trapped below decks when a violent storm drives their doomed sailing vessel on the rocks, the three world travelers must prepare to end their trip and perhaps their lives at the bottom of the sea. Their father is already missing and feared lost overboard in the raging waters.
Captain Krank and his villainous crew abandon the three young passengers to their fate and take the only available lifeboat to save themselves.
To reach their goal over the ocean, the three world travelers first must face the Beastly Monster, and after that, they must outwit the alien Mardushians who are in orbit around Pluto, seeking young Earthlings to serve as recruits in the Red Fleet.