Cassandra and Max find a missing magician's notebook and start to investigate the fire which burnt down his house and his mysterious "symphony of smells.".
Ian, spending the summer on Key West with his Uncle Gord, a dive shop owner, is drawn into a dangerous adventure when he sets out to learn why someone is trying to harm his uncle.
Almost seventeen-year-old Alison, who has synesthesia, finds herself in a psychiatric facility accused of killing a classmate whose body cannot be found.
When he wakes up from a coma after having meningitis, fourteen-year-old Luke finds that he has lost control of his senses and his thoughts and he must fight an inner demon in order to return to his former life.
Branded the class loser, twelve-year-old Basil reluctantly becomes friends with a bossy new girl who, like Basil, has synesthesia and comes to Basil's aid when his estranged mother returns and turns his life upside down.
Olivia helps her quirky friend Hal, whose synesthesia causes him to experience everything in colors, with a prank intended to get rid of Hal's potential stepfather, but there are unexpected consequences, including the disappearance of Hal's mother.
Afraid that she is crazy, thirteen-year-old Mia, who sees a special color with every letter, number, and sound, keeps this a secret until she becomes overwhelmed by school, changing relationships, and the death of her beloved cat, Mango.
Cassandra and Max find a missing magician's notebook and start to investigate the fire which burnt down his house and his mysterious "symphony of smells.".
