The crew of the "Barnacle" finds themselves entranced by an ethereal song, and only Jack, who seems unaffected by it, can defeat the mysterious force behind the dark spell.
Thirteen-year-old Charlotte must rescue humankind again when the evil Philonecron captures her cousin Zee, and Poseidon himself sends a sea monster to eat the cruise ship on which Charlotte's parents are trapped.
The crew of the "Barnacle" finds themselves entranced by an ethereal song, and only Jack, who seems unaffected by it, can defeat the mysterious force behind the dark spell.
