When thirteen-year-old Gelsem is kidnapped in the night from her peaceful home on Level Gee, the timid girl is shocked to wake up on Level Pee, the 'penitentiary'. Stuck in a foreign realm populated entirely by criminals, Gelsem manages to befrien...

Gelsem knows continuing her quest will be difficult, but nothing prepares her for the horror waiting on Level Ess. In the dark depths of the seas, Gelsem and her friends are trapped between warring tribes, trying desperately to solve a sinister pl...