A psychotic serial killer is hunting his final victim. The deadline is June 6th. And the target is Tom's six-year-old daughter, Teresa.

Freshly released from prison, Tom must race against time to save his child, but his hunt is compromised from the inside. His former best friend, Jim Veil, has been unmasked as the monster known as Dagger, and his own son, TJ, is lying to him.

Wracked with guilt and a desperate need for revenge, TJ has armed himself with a stolen gun and gone on his own rogue mission to kill the man who destroyed his family.

As father and son separately plunge into the city's dark underbelly, they find themselves in a two-front war. On the streets, they hunt a killer. In the shadows, a far deeper conspiracy pulls the strings. A mysterious "Architect" wants the children for their unique, virus-altered DNA, and a horde of "Strangers" are being drawn to them by an uncontrollable psychic force.

With the clock ticking down to Dagger's final, bloody ritual, Tom's team must unravel the mystery before it's too late. But in this deadly game, the greatest threat might be TJ's own quest for vengeance, a hunt that will lead him straight into the heart of the tunnels.