Smallville :

While dirt-biking with Pete, Clark falls into a cave located below a new LuthorCorp construction site, he discovers two hidden treasures: ancient Native American inscriptions that hold the key to his identity and a beautiful girl whom he believes to be his soul mate. A local Native American, Joseph Willowbrook, and his granddaughter Kyla, recount a story that reflects Clark's life.

Desperate to preserve the writings, Clark pits father against son by enlisting Lex's help in stopping Lionel's construction crew from demolishing the cave.