Vincent Price plays a Shakespearian actor Edward Lionheart, who re-enacts murder scenes penned by the famous bard, in order to gain revenge on the nine theatre critics who have denied him the Best Actor of the Year award. His accomplice is his devoted daughter (Diana Rigg) and together they seek revenge in a most bloody and violent way: one critic is decapitated in his bed, one is made to murder his own wife and another is forced to eat his beloved dogs.

Gerald Thomas directs this seventh film in the 'Carry On' series starring Sid James and Hattie Jacques. Charlie (James), the owner of taxi firm Speedee Taxis, finds he has some serious competition when rival company GlamCabs opens up nearby. With his company facing bankruptcy, Charlie suggests a merger only to call it off when he finds out his wife Peggy (Jacques), who started GlamCabs as a way to get back at him for years of neglect, is the new firm's mysterious owner. However, when Peggy is then kidnapped by bank robbers, Charlie is forced to put his issues to one side and rally the drivers at Speedee Taxis in a bid to rescue her and bring her home to safety. The cast also includes Kenneth Connor, Jim Dale and Cyril Chamberlain.