Three robbers hide a stolen jewel inside a stuffed animal at one of the midway games in an amusement park. When Jack—a teen with a part-time summer job in the park—his best friend David and two girls hang out at the park, they get mixed up in the robbers' scheme to take back their jewel.

Penfield Gruber, a once great scientist, is reduced to managing a sleazy hotel. He monitors the daily comings and goings of his tenants, mainly for his own interest, until underworld figures ask him to spy on a suspected double-crosser. While watching the man, Gruber overhears a murder plot.