For Project GATE recruits, success is everything, failure is death.

After Marina washes out of training, she's sent for termination. But when a rebellion rises, she escapes to join Olesya on the icy coast of the Baltic Sea. Here, she finds the popularity and power of a violent anti-genetics movement spreading like wildfire. They're called Purity, and they want people like Marina to burn.

While Marina and Olesya are ensnared in a battle against Purity zealots, another rebel, Sophia, discovers more about Project GATE than she bargained for: every recruit carries a genetic kill switch, and someone is planning to use it.

Now it's a race against time. Marina and Olesya must overcome impossible odds and Sophia must fight to save her fellow operatives from their own bodies. Success is everything, failure is death.

This is the fourth episode in the action-packed Helix sci-fi thriller series by USA Today bestseller Nathan M. Farrugia. If you like conspiracy, espionage and edge-of-your-seat suspense, then you'll love this thrilling cross between Jason Bourne and Dark Angel.

To read more about the Helix series, visit helixseries.com