A decade after her son suffocated in the abyss while her husband diverted the only rescue sub to save his mistress's daughter, deep-sea specialist Sienna refuses to dive for the same man's stranded child, even for millions. When Julian threatens her crew, she reveals the truth and watches his desperate attempts fail. She salvages her son's tomb and Julian's crushed wreck together, finding peace as his empire crumbles. A tale of revenge, grief, and the ocean's final accounting
