Kendra Shaw is a 'fallen angel' — a once-brilliant counterterrorism operator who suffered a nervous breakdown during a harrowing mission. Now disgraced and suspended from duty, she is sent back home to recover. She is put on medication. Endures months of therapy. And slowly, surely, she starts to emerge from the shadows. But any peace is short-lived. One afternoon, on a busy street corner, Kendra spots a familiar face from her past. Ryan Hosseini—the lover she left behind ten years ago when she decided to serve her country. Wrestling with old regrets, she is about to approach him when she realises that he isn't alone. A surveillance team is hovering close by. Affiliation unknown. Intentions unknown. And before Kendra can make sense of the situation, a bomb detonates and rips through the lunchtime crowd. And amidst the fire and rubble, Ryan vanishes. Now Kendra finds herself on the hunt once more. Searching the city. Determined to uncover the truth. Is Ryan a victim of circumstance? Or is he a home-grown terrorist on the verge of unleashing an even deadlier attack?