Left on his own again, Stud gets sucked into one of his father's journals down into an ocean kingdom grappling with the murder of its king, but luckily he can turn his bare hands into hammers. When Stud stumbles upon one of his father's journals detailing his past adventures with Tara, Stud's mother; our young hero unknowingly makes a wish. Using "wishing coins," after reading a passage about them, Stud gets sucked into the book, and it is at the location of one of his parents' adventures! While that would be weird enough, he's fallen on top of a hammerhead shark by the name of Steele, who is suspected of killing the Ocean King. Stranded in a water world and unable to breathe without special assistance, Stud's in a bit of trouble. With no way home in sight, he attempts to finally make a friend who can help him and thus chooses to aid the Mermaid Detective trying to solve the murder case. Can Stud solve this problem with his shiny hammer hands? He's going to try!