Twelve-year-old Iveliz is trying to manage her mental health and advocate for the help and understanding she deserves, but in the meantime her new friend calls her crazy and her abuela Mimi dismisses the therapy and medicine Iveliz needs to feel like herself.

When the murals painted on the walls of her Brooklyn neighborhood start to change and fade in front of her, Sierra Santiago realizes that something strange is going on--then she discovers her Puerto Rican family are shadowshapers and finds herself in a battle with an evil anthropologist for the lives of her family and friends.