Jill Robinson and her cousin Patti arrive on the enchanted Maple Island, in search of romance. Jill finds it in local artist Chris Bergner, however, after seeing birthmark on her neck, he cools to her and insists she leave the island. The town doctor, Faye, convinces Jill to stay and fight for her man, but in the meantime, Jill's cousin, Patti has gone missing and soon turns up dead. Jill's search for her cousin and answers about her death lead her to a chilling discovery - the residents of Maple Island don't grow old and don't die! The good doctor's chilling experiments are behind this seeming miracle, but it has its sinister side: an outsider must die every year to provide the antibodies for her vaccine - and Jill is next! The love between Jill and Chris wins out in the end and he gives up his immortality to destroy the doctor and leave the island to live out his remaining days with his true love.