As an 11-year-old boy struggles to cope with a disability, he finds a pony who gives birth to a unicorn which he takes care of.

Hubert, a brash 17-year-old, is confused and torn by a love-hate relationship with his mother that consumes him more and more each day. After distressing ordeals and tragic episodes, Hubert will find his mother on the banks of Saint Lawrence river, where he grew up, and where a murder will be committed: the murder of childhood.