During World War I, a German U-boat sinks a British ship and takes the survivors on board. After it takes a wrong turn, the submarine takes them to the unknown land of Caprona, where they find dinosaurs and neanderthals.

The accidental unearthing of Satan’s earthly remains causes the children of 17th-century English village to slowly convert into a coven of devil worshipers.

When 17 year old Joanna comes to Swinging London, she meets a host of colourful characters, discovers the pleasures of casual sex and falls in love. That’s when things get complicated.