When an old love visits Maria her passion for music resurfaces, which jeopardizes her relationship with Michael. Meanwhile, while Max's father is still trying to put together all the pieces of his investigation, Isabel joins Max in the quest to stop him.
Max, Isabel and Michael have been hiding a secret for their entire lives - that they come from a different planet. When Max is exposed while saving Liz's life, a girl who attends their high school, it eventually leads to a few others learning their secret. The three aliens and their new friends try to go about their normal lives while trying to discover more about where they come from and how to get home - all while keeping their identities secret from the rest of the world.