Five animated adventures featuring Inspector Gadget. In 'The Boat', Doctor Gang is organising a cruise for wealthy people in order to steal all their jewels. Gadget's mission is to foil Gang's plans. In 'Haunted Castle', an international congress of detectives is holding a meeting at a castle in Transylvania, but Quimby suspects that Gang has decided to make this castle haunted in order to ruin the meeting. 'Race to the Finish' sees Gadget, Penny and Brain go to a Grand Prix. Quimby learns that Gang will participate in the race with his MADmobile and will try to win the race at all costs. In 'The Ruby', a valuable and precious ruby has just been stolen from India. It appears that the gang want to use the stone to operate a laser beam capable of destroying a communications satellite. Finally, in 'A Star at Last', Gadget must protect the famous rock star, Rick Rocker, because MAD wants to kidnap him in order to have millions of young people under their thumb.