"Jay Gardiner has given himself a fool's errand-to find the remains of his deceased father in the Pacific Ocean off the coast of Monastery Beach. He knows it's a long shot, but Jay feels it's the only way for him to lift the weight of guilt he has carried since his dad's death by suicide the previous year. The dive begins well enough, but the sudden appearance of a giant squid puts Jay in very real jeopardy, made infinitely worse by the arrival of...

Seventeen-year-old Sia Gianopoulos writes to her incarcerated father as she and a handful of other survivors reach a mysterious island after a monster sinks their charter boats.

Scuba diving in Papua New Guinea, the MacGregors and Natalie Crosswhite find a concealed safe, and later discover a dangerous link between a toxic underwater leak and an illegal gold-mining operation.