Marcus Kane used to save lives. Now he mops floors and walks security rounds on the night shift, hiding in the basement of a twelve-story hospital where no one asks about the war he left behind.

Then the lights go out.

On the worst blizzard in Chicago's history, two armed strike teams storm Edenbrook Medical Center for the same man: a cartel lieutenant bleeding out under police guard. One side wants him alive. The other wants him silenced?along with every witness in the building. The phones are jammed. The roads are dead. Help is ninety minutes away, and the clock is running.

Marcus knows every duct, every blind spot, every way to disappear. He could walk out clean.

But his seventeen-year-old daughter is trapped somewhere in the dark, and the machines keeping the sickest patients alive are down to their last minutes of battery.

To save her, the man who swore he would never again choose who lives and who dies will have to do it all night long?and turn two armies against each other before time runs out.

A relentless, real-time siege thriller for readers who won't put the book down before dawn.