A massive earthquake shakes up the southland. Cort and Craig go diving and when they return to the boat, they discover that two fishermen on another boat are dead. Then Cort smells poisonous gas and they swim away from the boat. When there's an aftershock, they get trapped inside a cave. Mitch and Garner locate them from a helicopter and Mitch has to use dynamite to get them out. Gina is up on the roof, repairing the damage the earthquake caused, when the aftershock comes. She falls down through the roof and is trapped under something heavy, with sharp pieces of glass hanging in the roof right above her, just waiting to fall down on her. But when Hobie and Rocky arrive, Hobie is able to save her just in time. Garner has to make a rescue and get wet because there's a boy in trouble on some rocks. Mitch teases him about it. Eddie's truck gets stuck in the sand when the earthquake strikes. A pregnant woman named Valerie rescues him. When Valerie goes into labour, Eddie and Shauni has to d