10 years ago, Mr. Peabody, the smartest mind on earth, who also happens to be a dog, adopts a boy in a court of law, making history. Peabody vowed to show the boy the wonders of history through a contraption known as the WABAC. During a professional business stint showing off Peabody’s latest invention, he comes across Vladostov Pavlov, the grandson of a Soviet official, who was quite upset with the fall of the USSR in 1991. Sherman appears to meet his dad there, only for him to be threatened by Pavolov. Soon Pavolov takes a time machine he stole from Membrane Industries to go back through time in an attempt to change the outcome of the Cold War. Hearing of this plan, Peabody and Sherman chase after Pavolov in the WABAC, causing them to crash in other time periods, chasing after Pavolov to prevent him from getting things that could help him in his plan.
