John McClane travels to Russia to help out his seemingly wayward son, Jack, only to discover that Jack is a CIA operative working undercover, causing the father and son to team up against underworld forces.

When a gunman takes five lives with six shots, all evidence points to the suspect in custody. On interrogation, the suspect offers up a single note: "Get Jack Reacher!" So begins an extraordinary chase for the truth, pitting Jack Reacher against an unexpected enemy, with a skill for violence and a secret to keep.