After Tova's husband died, she began working the night cleaner shift at the aquarium. Ever since her eighteen-year-old son, Erik, mysteriously vanished on a boat, keeping busy has helped her cope. One night she meets Marcellus, a giant octopus living at the aquarium who sees everything, but wouldn't dream of lifting one of his eight arms for his human captors - until he forms a remarkable friendship with Tova. A gripping family mystery meets a story of second chances in this feel-good debut.