Vermont 1978: Dr. Helen Hildreth, psychiatrist, is acclaimed for her work with mentally ill at her renowned treatment center. At home, she is just Gran when taking care of Vi & Eric, her grandchildren. One day Gran brings home a child to stay with the family but Iris does not behave like a normal girl. Vi & Eric invite Iris to join their Monster Club. They catalogue all kinds of monsters & makeup ways to defeat them. Iris comes out of her shell.