El agente Ethan Hunt, acusado de un atentado terrorista con bombas contra el Kremlin, es desautorizado junto con toda la organización, al poner en marcha el presidente el llamado 'Protocolo fantasma'. Abandonado a su suerte y sin recursos, el objetivo de Ethan es rehabilitar el buen nombre de su agencia e impedir un nuevo ataque. Pero emprende esta misión con un equipo formado por fugitivos, cuyos motivos personales no conoce bien.

Ethan Hunt and his team are racing against time to track down a dangerous terrorist named Hendricks, who has gained access to Russian nuclear launch codes and is planning a strike on the United States. An attempt to stop him ends in an explosion causing severe destruction to the Kremlin and the IMF to be implicated in the bombing, forcing the President to disavow them. No longer being aided by the government, Ethan and his team chase Hendricks around the globe, although they might still be too late to stop a disaster.