The Rangers believe their work is done after they've defeated Sledge and his evil monsters. Unbeknownst to them, an even more powerful monster is picking up where Sledge left off and is closer to the Rangers than they think.

Shelby receives a pillow from an unknown sender. When she uses it to take a nap, she starts living a nightmare. The Rangers suspect this must be from Snide so they all make sure to stay awake, but that proves to be harder than they thought.

The Dark Energem creates a black hole that takes the Rangers back in time, as they must go to a prehistoric age for their final showdown with Sledge and Fury.