Cupid, heartbroken that love has outdated him, finds a new way to create love in this hopeless world.

An aspiring jewelry designer returns to Belgium to visit her grandfather and hopefully win the Valentines Day Diamond Contest.

Reverend David Poe and his psychiatrist wife trade hectic New York life for an idyllic rural farmhouse; the perfect place for 10 year old twins Jack & Emily to run, play and imagine. Documenting this lifestyle change, David decides to film every holiday and special family event. To the Poe’s horror their home movies reveal an increasing malice and evil within their children and by Valentines Day, the children’s sadism has turned to a blood lust for human prey.

High school student Mizushima receives Valentines Day chocolates from the new student, Monami. Little did she know that the chocolates contained traces of Monami’s vampire blood. He gets infected from eating them and Monami confesses that she wants to live with him forever as vampires. Meanwhile, Mizushima decides that he wants to fully become a vampire with Monami’s help. Keiko, Mizushima’s girl friend, sees the two on the school rooftop kissing and in a state of hysteria, attempts to throw Monami off the roof but falls off herself instead. Keiko dies but her father, Kenji Furano, the mad scientist, resurrects her as Franken girl. Thus begins a deadly combat between Franken Keiko and Vampire Monami in the name of love.