Twelve-year-old Lou Montgomery's life has been centered on her mother's terrifying plan to make her a singing star, but a crisis reveals Lou's sensory processing disorder and people determined to help her address it.

Oona the mermaid is friends with everyone, but when her attempts to befriend a shark with sensory issues fail miserably she realizes what may be fun for her may be overwhelming for him.

Willa lives on the upper West Side of Manhattan with her divorced father and her younger brother and attends fifth grade with her best friend Ruby, and she likes things to be a certain way, because it makes life manageable even with her Sensory Processing Disorder; she certainly does not like surprises, and her father has just thrown her a big one: he has been dating Ruby's mother, and suddenly Willa's life seems to be spiraling out of her control--and...