A centuries-old vampire, the countess (Lauren Hutton) has kept her youthful look by drinking the blood of male virgins. Since she finds this prey challenging to come by, she is thrilled when she meets young Mark Kendall (Jim Carrey), who wants to lose his virginity, yet has a reluctant girlfriend, Robin (Karen Kopins). After luring Mark away from a club, the countess drinks his blood, but the hapless guy isn't sure what has happened until he starts exhibiting unusual symptoms.