Raven's Gate by Anthony Horowitz

Matthew Freeman is a normal boy. One day Kelvin, one of his friends convince him to steal some dvds from a shop. When he's inside trying to get as more dvds as possible he gets caught. He is then sent to Yorkshire as part of a rehabilitation program , called the Leaf Project. He goes to live with a strange person in a strange place. One day he tries to escape, going in the woods, but gets back to the place he started and can't understand why. Later he finds out that long ago, a group of people called the Nexus, banished a group of evil beings called The Old Ones. He then finds out that the Nexus are four boys and one girl, and that he is one of them. With the help of the Nexus and a journalist named Richard Cole, he defeats The Old Ones and the Raven's Gate doesn't open.