Through the new role that bokaj takes on to protect Tomas they learn to help move the unstable mother into a new world and not to trust your own life and only this can break a curse which comes through great pain and sacrifice.
Jakob lives with his unstable mother. She constantly explodes into wild rages and Jakob does what he can to protect his baby brother Tomas. By assuming the role of his evil twin Bokaj, he is able to vent his suppressed emotions. This role playing begins as an innocent game, but after a while, he grows increasingly unable to distinguish between game-playing and real life.—Anonymous