The 7-year-old boy, who is living a very warm and rosy life, suddenly faces a major "incident" in his life: having a younger brother and learning how to do him. Everytime you are always the focus in your parents eyes, but now Tim has to accept to share love. And yet, his monster brother "dominated" the whole house, bullying Tim and always crying in front of his parents for the right to coax.
But, the baby is not as "baby" as they think, "Boss boss" speaks the adult voice and behaves like a sibling, the mysterious figure inside this baby from where and for what purpose?
