A treasure hunter (Josh Margulies) discovers an old journal that, along with a compass he inherited as a boy, leads to an ancient Hawaiian secret that's been lost for generations. This powerful staff is known to contain a mystical force that could destroy the island. But his greedy rival (Dezmond Gilla) is determined to secure the staff's power for himself, leading to a cat-and-mouse game through the wild Hawaiian rainforest.

Two years after Ethan Hunt had successfully captured Solomon Lane, the remnants of the Syndicate have reformed into another organization called the Apostles. Under the leadership of a mysterious fundamentalist known only as John Lark, the organization is planning on acquiring three plutonium cores. Ethan and his team are sent to Berlin to intercept them, but the mission fails when Ethan saves Luther and the Apostles escape with the plutonium. With CIA agent August Walker joining the team, Ethan and his allies must now find the plutonium cores before it's too late.

Convinced that his father, who had disappeared at sea two years earlier, is still alive, the 12-year-old Felix sets out to find him in the company of Old Tom, a retired fisherman, Squawk, the one-legged parrot and Rover, a cat who acts like a dog. Their journey takes them to the Darkshadow Island, to an underground city where a secret society is hiding, led by the megalomaniac Morgäa, possessor of a priceless treasure.

Upon the death of her grandfather, a woman and her husband return to her birthplace in Germany's Black Forest, only to find a terrifying secret awaits them.