Five months following the murders, Christopher Robin tries returning to his regular life while dealing with his PTSD. Deep within the 100-Acre-Wood, a destructive rage grows as Winnie-the-Pooh, Piglet, Owl, and Tigger find their home and their lives endangered after their existence is revealed.
A vanished submarine prompts a rescue operation that leads to the Loch Ness monster. Having escaped the Loch, the creature unleashes decades of pent-up aggression on those it encounters.