After her cousin Zee arrives from England, thirteen-year-old Charlotte and he must set out to save humankind from denizens of the underworld, Nightmares, Death, Pain, and a really nasty guy named Phil.
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.
As Philonecron plots to destroy the gods, transform the Underworld, destroy humanity, and remodel Olympus, Mr. Metos takes thirteen-year-old cousins Charlotte and Zee to join the Prometheans, who have an age-old weapon that may help protect them.
