A girl named Isabella has an imaginary friend named Marcus, that everyone just laughs at. She gets bullied badly over it, resulting in constant fights and a fight for survival, leaving her mute. She doesn't want anything to do with anyone, not even you and will kill anyone who dares to hurt Marcus. What happens when a classmate actually takes notice of Marcus and doesn't see him as a big joke? Let's just say, Isabella and even Marcus, are in for the ride of their lives.