Evan, who just lost his mother to cancer, decides to go on a trip to Italy. He's sort of lost, at first, meets up with some English guys and hangs out until he encounters a beautiful, mysterious woman. They hit it off but she seems very reluctant to get involved. He's persistent, though, and the continue to see each other. The reason she's so hesitant is that she's not human but an immortal who changes her appearance every few decades. While this metamorphosis is happening she begins to transform into different primordial states, from a werewolf like creature to something out of an H.P. Lovecraft nightmare.
SPRING is a very cool, original monster movie with great effects to support the story. Highly recommended.