Twenty-six years after outrunning a suspiciously familiar masked killer, the Core Four are back in the killer's crosshairs and no horror movie IP is safe.

George Hardy is a shepherd who reads detective novels to his beloved sheep every night, assuming they can't possibly understand. But when a mysterious incident disrupts life on the farm, the sheep realize they must become the detectives. As they follow the clues and investigate human suspects, they prove that even sheep can be brilliant crime-solvers.

Having thwarted Bowser's previous plot to marry Princess Peach, Mario and Luigi now face a fresh threat in Bowser Jr., who is determined to liberate his father from captivity and restore the family legacy. Alongside companions new and old, the brothers travel across the stars to stop the young heir's crusade.

A talented piano tuner's life is turned upside down when he discovers that his meticulous skills for tuning pianos can equally be applied to cracking safes.