It will be up to Number Five, Diego, Luthor, Vanya and all the others to prevent a nuclear apocalypse once again.
Now the Umbrella Academy must find a way to reunite, figure out what caused doomsday, put a stop to it, and return to the present timeline to stop that other apocalypse.
It seems that the events of the first season have generated an alternative timeline in which the Soviet Union is giving a hard time to the US.