In a sun-soaked Hawaiian town with a mysterious past, a group of friends is left with a dark secret after a tragic accident. One year later, a member of the group receives a threatening message, and the friends now know that someone intends to make them pay for last summer.

Al, Riley, Art, Lizzie and Vanessa work together against a ticking clock to get Al's sister out of Afghanistan and to safety after Kabul falls.

After an earthquake destroys their underwater station, six researchers must navigate two miles in the dangerous, unknown depths of the ocean floor to make it to safety in a race against time.