While on vacation, Reed takes the opportunity to search for the so-called Lost Lagoon. Hiring a guide to help them, it soon turns out that the guide is really the "Monster" from the Lost Lagoon. After a misunderstanding that leads to battle between Reed, Ben, Johnny and the Monster, Reed soon realizes that the "monster" is actually an intelligent creature from another planet seeking to repair his ship so that he and his mate can return to their own planet. Helping the "monster" repair their ship, Reed and the others see the alien off back to its home planet.

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