At the bottom of the ocean, a group of scientists and a small naval unit are recruited to investigate the mysterious sinking of a U.S. Navy submarine. The mission takes them to a research platform thousands of meters underwater, where tensions rise and personal conflicts come to the surface. The protagonist, a drilling engineer, faces not only the pressures of a hostile environment but also her tumultuous relationship with her ex-husband, one of the team members.
As they descend into the depths, the group encounters a series of strange phenomena that challenge their scientific understanding. What starts as a simple quest for answers turns into a terrifying experience when they discover an underwater intelligence that seems to communicate with them. Fear and distrust take hold of the team, and soon, their own personal demons swirl in an emotional maelstrom amid a thrilling adventure.
The situation becomes critical when the rivalry between the scientists and the military reaches a breaking point, leading to drastic decisions that could have apocalyptic consequences. As the story unfolds, the group must learn to trust not only in themselves but also in the unknown that surrounds them. What begins as a mere expedition ends up being a journey of self-discovery, where the true horror comes not only from the sea but from the human soul.