An African diamond mine run by a ruthless security officer, Harry Webb, faces a serious threat as diamonds go missing. Webb becomes suspicious of the mine's employees and tensions escalate when security measures tighten. Determined to uncover the culprits, Webb assigns Mike Bradley, an undercover agent posing as a mineworker, to investigate the thefts. As Bradley integrates himself among the workers, he discovers that the mine’s reputation for being impregnable is at risk from a well-organized crime syndicate planning an elaborate heist.

Bradley forms alliances with some of the workers while maneuvering around Webb’s intense scrutiny. Meanwhile, the criminals prepare for their operation, carefully studying the mine's security weaknesses to execute their plan flawlessly. As clues unfold, Bradley finds himself in a race against time to prevent the imminent heist. Suspense builds as trust is tested and moral dilemmas arise, leaving the fate of the mine hanging in the balance.