Scotty moves into Mrs. Engels' seaside mansion where three other college students are boarding. Mrs. Engels prefers to stay in her room in the attic, but her son Mason helps the students get settled. Soon one of the students is killed. The policemen on the case begin uncovering the Engels family secret as the remaining students become endangered

A mysterious door in the basement of the Hercules house leads to the Sixth Dimension by way of a gigantic set of intestine. When Frenchy slips through the door, King Fausto falls in love with her. The jealous Queen Doris takes Frenchy prisoner, and it is up to the Hercules family and friend Squeezit Henderson to rescue her.