Henry Roth is a man afraid of commitment until he meets the beautiful Lucy. They hit it off and Henry think he's finally found the girl of his dreams until discovering she has short-term memory loss and forgets him the next day.
A young and parentless girl adopts a 'dog' from the local pound, completely unaware that it's supposedly a dangerous scientific experiment that's taken refuge on Earth and is now hiding from its creator and those who see it as a menace.