Ghastly pulled him around to look him square in the face. "So, boy, tell me where you found this thing, he leant close to Cool and shoved the comb before his eyes. "I found it on the beach," answered Cool, "This morning out in the bay by the seaweed-covered rock." When Retishella mermaid loses her comb it seems like the end of the world. She is banished from her family and friends until she finds it again. She discovers it has been picked up by a press-ganged pirate boy called Coolihan Barrat, known as Cool. He is desperate to escape the harsh pirate life dominated by Captain Jellycoe Jack and his single-minded mission to find treasure, no matter what the cost. Cool befriends Retishella, but when pirate Garston 'Ghastly' Bones gets hold of Retishella's comb and refuses to return it, Retishella finds herself rubbing up against the dreaded Cheerless Witch.