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.