When Allan becomes a quadriplegic he loses all hope for living until he meets Ella - a monkey trained to fetch and carry for him around the house| obeying him in all things. But Ella is part of another experiment| and when she starts responding to Allan's underlying rage and frustration she has the ability to carry out her master's darkest wishes.
A quadriplegic man is given a trained monkey help him with every day activities, until the little monkey begins to develop feelings, and rage, against its new master and those who get too close to him.