Alex Pettyfer is John who appears to be human but is not. John is from a planet called Lorien. John is one of nine alien children that have been brought to earth and hidden there to escape the attack of a race of evil aliens called the Mogadorians that have destroyed their home planet called Lorien. The Mogadorians are not satisfied with destroying just Lorien until they have killed all of the race from there, even those that escaped. There are only nine left. They are all on earth. They must be killed in order. The first three have already been killed. John, as the fourth one, is the next in line to be killed so he is at great risk.
John is protected by a guardian Henri (played by Timothy Olyphant). They constantly move from town to town when the Mogadorians may have a chance to find them. After they move to Paradise, Ohio John is sick of moving around. He falls in love with a local girl named Sarah (played by Dianna Agron). Even though John knows he is at risk of being discovered and Henri wants them to get out of there, John refuses to leave. Sarah's ex-boyfriend Mark (played by Jake Abel) is so jealous of John that with the help of his buddies he kidnaps John and Sarah. They take them to the woods. This is when John displays his super powers to protect Sarah.
The Mogadorians figure out where John is hiding. The capture Henri. John figures out where they are holding Henri. He tries to rescue him, but in the attempt Henri gets killed. John does get some of the alien stuff in the rescue attempt which helps him figure out how they are able to track his location. John meets a woman who is also from Lorien. She is number six. Together they decide to fight the Mogadorians with the help of a shape-shifter protector that appears as a normal dog but in reality is a powerful Chimera. They fight to the death because it is not only those remaining of the nine original Loriens that are the target of the Mogadorians but also the entire human race will be annihilated if the Mogadorians take over earth.
Best part of story, including ending:
John's super powers are really spectacular and include the ability to go very fast, make fire and such things as shooting electricity from his hands. That is very cool.
Best scene in story:
I like the scene when the Chimera, that is disguised as an ordinary beagle dog, transforms into a powerful protective monster creature to help them.
Opinion about the main character:
John simply wants to fall in love and be a normal high school student, not have all the super powers that he possesses. This is charming, but fate will not let him have such a simple life.