Inciting Event: Manny, Sid, and Diego realize the dam is about to break and flood the valley.
First Plot Point: Manny meets another mammoth, named Ellie, who believes she’s a possum.
First Pinch Point: The sea monsters break out of the ice and attack.
Midpoint: Ellie realizes she’s not a possum.
Second Pinch Point: The vultures look forward to eating all the dead animals.
Third Plot Point: The dam breaks and traps Ellie.
Climax: The boat leaves without them.
Climactic Moment: Scrat accidentally drains the flood.
Resolution: Ellie decides to stay with Manny’s herd.