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Max, whose world was devastated when an alien species crash-landed on Earth, unleashing a deadly plague that claimed his wife and much of humanity. In the fragile society that remains, humans have learned to coexist with their extraterrestrial invaders. But for Max, survival isn’t enough. His older daughter, Greta, is dying from the disease. As her body weakens, an alien Sentinel lurks outside their home, drawing nearer and nearer as Greta takes her final breaths. This silent, unyielding predator is on a mission to collect her body to fulfill an unstoppable metamorphosis ritual. The government sanctions it. Society accepts it. But Max refuses to have anything else taken from him.