Deep down,
six hundred and forty feet underground,
danger lurks...

What starts as an evening out at an underground museum soon turns into a dangerous struggle to survive...

Jenny Strafford and her fiance, Stone, are out for a dinner date with friends. It's supposed to be fun - romantic even - but it soons turns deadly when they're trapped deep underground with a mysterious contagion.

When the unthinkable happens, and a quarantine zone is initiated, Jenny soon realizes that the government agency that has been sent to help them isn't planning on a happy ending.

In order to protect Jenny, Stone must fall back on his military training. And even those hard-won skills may not be enough to save the love of his life, or the other one hundred innocent people trapped deep underground with them.

An all-new series with an all-new hero.
Sam Stone will take your breath away.