Captain Belton Fletcher Jr. has spent seventeen years serving as one of South Africa's most elite Navy SEAL commanders at the Simon's Town Naval Base.Battle-tested. Respected. Fearless.After surviving what should have been his final mission, Belton is ready to retire and return home to care for his aging mother.But one last classified operation changes everything.Tasked with transporting a mysterious ancient package to a sealed underwater cave, Belton and his crew board a newly built military submarine for what should be a simple drop-off mission.Then the impossible happens.Whales attack.A violent underwater storm appears without warning.And something inside the package wakes up.