While practicing motocross with Pete, Clark Kent falls down through a hole in an underground cave and meets a young Native American woman named Kyla Willowbrook (Tamara Fieldman). Kyla is investigating some mysterious ancient paintings in the walls of the cave, and she and Clark immediately fall in love with each other. Her grandfather Professor Willowbrook and some ecologists are fighting against the construction of a Luther Corp building that will destroy the caves, but generate 1,000 new jobs in Smallville. Martha becomes split between the both interests, but the blind Lionel is motivated only by greed and self-interest to keep the project open, while Lana rallies the rest of the town in a protest to stop the construction project. Meanwhile, a mysterious wolf-creature kills a construction foreman, and threatens Martha and the blind Lionel. Following investigation by Chloe, Clark believes that the Professor Willowbrook is a mutant with the power of transforming himself in a wolf. But the real culprit is Kyla.

The story of Clark Kent culminates in this two-hour series finale as Clark takes the last step to becoming the Man of Steel.