An American Werewolf in London
part of An American Werewolf

Two American college students, David Kessler (Naughton) and Jack Goodman (Dunne), are backpacking across the Yorkshire moors when they are attacked by a large, unknown animal. Jack is killed, but David survives the mauling and is taken to a hospital in London. When he wakes up some time later, he does not remember what happened and is told of his friend's death. Things get stranger when he is visited by Jack's ghost, which takes the distressing form of a reanimated corpse, who explains that they had been attacked by a werewolf, meaning that David himself is now a werewolf. Jack urges David to kill himself before the next full moon, not only because Jack is cursed to exist in a state of living death for as long as the bloodline of the werewolf that attacked them survives, but also to prevent David from inflicting the same fate on his eventual victims.

In the opening scene, a man is seen under attack, almost managing an escape from the Parisian sewers before an unseen creature pulls him back. Meanwhile, tourist Andy McDermott is seeing the sights of Paris with his friends Brad and Chris. When Serafine Pigot leaps off the Eiffel Tower just before Andy is about to do a bungee-jump, he executes a mid-air rescue. She vanishes into the night, leaving Andy intrigued - and also unaware that she is the offspring of the couple seen 16 years ago in the earlier film. Andy tracks her down, asks for a date, attends a party, and winds up in her bed. When he awakens, he has toothmarks on his leg and is informed that he's making a transformation into a werewolf, confirmed by his sudden taste for raw steaks. Serafine explains that her stepfather (seen in the film's opening scene) has been working on a drug to control her werewolf transformations. Beneath a full moon, the love story continues.