A dream vacation turns into something far more dangerous when Amy and her friends arrive at a breathtaking tropical resort, complete with crystal-clear waters and once-in-a-lifetime adventures. When they decide to explore a mysterious underwater site hidden deep beneath the ocean's surface, it seems like the perfect thrill. But not everything beneath the waves is meant to be discovered. As the group ventures further into the unknown, strange feelings creep in, and the beauty of the ocean begins to shift into something far more unsettling. With time running out and danger closing in, Amy must rely on her instincts-and her friends-if they have any chance of making it back to the surface. Because down here, the ocean doesn't just surround you... it watches.