3 Brothers, 1 Bond

The Chipmunks have been one tight group of not just band members, but brothers too. Even if Alvin gets on Simon and Theodore's nerves once in a while. But they love him. They thought nothing could ever break them apart. That is, until they met Marcus. A blonde haired kid from Tennessee. Everyone loves him. He helps orphans, volunteers at the children's hospital and vet's office. He's become real close with the chipmunks ever since. Except for one flaw, behind everyone's back, when no one is around, he terrorizes Alvin. He keeps showing up everywhere with a black eye or sprained wrist or ankle. He tries to tell them about Marcus, but no one believes him. But what happens when things go too far?