 The Munsters receive a very estrange package from uncle Gilbert. Herman opens it with Lily and Eddie, and surprised they find out that that s a great treasure, full of gold coins. As a matter of fact, uncle Gilbert has asked them to keep the treasure until he arrives. They decided to deposit the treasure in the bank. In the process, they re assisted by a young clerk, Ben (Duncan McLeod) with whom Marilyn instantly feels attracted. Lily notices Marilyn s impression, and the next night she and Grandpa help her to have more intimacy in the living room with Ben. Herman disapproves that they re meddling in the relationship. Everything goes well to Marilyn, until Grandpa receives a mysterious call from a man, claiming that Ben s nothing more than an opportunistic rat, only interested in uncle Gilbert s money. Before he tells anything to Marilyn, Granpa tries a spell to help her, but everybody but Herman end up in a motel in Kansas City. Grandpa calls Herman from there, and warns him about Ben. Herman decides to wait him in Marilyn s room, and when Ben gets there, he ll have a scare of a hell. Dissapointed, Marilyn resigns herself to face the truth, but uncle Gilbert (a sort of "creature from the black lagoon") arrives to cheers the family up.