Merah lives a normal life seemingly without a worry in the world. When one day, she goes to sleep and wakes up in one of her sister's dreams. Her sister, Iris reveals to lack a positive bond with Merah and their other siblings due to competition to gain their parent's approval. As their worst nightmares have grown large enough to physically hurt them in their dreams, it’s left to Merah to fix her relationship with her sisters and to help them face their fears.