IF THEY KNEW

When Theo Parrish's father dies, he inherits more than grief-he inherits Parrish Cruise Lines, the ambitious start-up company his father spent years building from the ground up. Since his twin brother, Tyler, has no interest in the business, sole responsibility falls on Theo's shoulders.

Determined to prove himself-and to honor his father's legacy-Theo boards the company's first vessel for what should've been a simple training voyage, turns out to be anything but...

Without warning, a merciless storm hits and in the midst of the chaos, the ship's communications fail, and power falters. Adrift and aimless, the vessel is left dead in the water.

Tasked with the unthinkable, Theo must choose his every move carefully, as the fate of every soul left on board is in his hands.

As days bleed into weeks, then endless months, supplies dwindle, and desperation sets in. Alliances form, leaders emerge, and dark secrets surface-with one passenger on board carrying the darkest secret any of them could imagine...

The question is no longer when rescue will come...

...but who will still be alive when it does?