When ex-Navy Captain Ethan Cole answers a mysterious distress call in the middle of a violent storm, he expects to rescue survivors-not uncover a secret the world was never meant to find. Washed ashore on an uncharted island, Ethan and his crew discover the wreckage of a forgotten experiment, a place where science blurred the line between human and machine. But the island is alive. Its jungle hides twisted remnants of soldiers long dead, its air hums with an unnatural energy, and its heart-the Core-beats like something sentient. As Ethan fights to survive and uncover the truth, he faces the one man he thought he'd lost forever: his brother, now changed beyond recognition. In a race against time, Ethan must choose between saving what's left of humanity-or burying the island's dark secret forever. Because on this island, no one ever truly leaves.