After witnessing an explosion near some meteor fragments, Lana gains the ability to see through other people's eyes. Clark and Lana race to find Chloe after Lana "watches" Chloe being kidnapped and buried alive. Meanwhile, Lex discovers evidence that a spaceship landed in Smallville Meanwhile, Lex discovers evidence that a spaceship landed in Smallville.

After Jonathan's wallet is stolen, Clark uses his super speed to chase after the thief, Bart, aka The Flash (KYLE GALLNER), but is stunned when he cannot catch him. Bart visits the farm and tries to persuade Clark to leave Smallville for a life on the road together, flexing their superpowers. Meanwhile, Lex buys a priceless framed manuscript with Kryptonian symbols, and Clark learns that it contains a mysterious hidden map. However, when Bart steals the manuscript from Lex, he inadvertently puts Clark's life in danger and must make a decision to save Clark or himself.

Clark discovers the reason he was sent to Earth after a nightmare foretells a horrible event that's about to befall Smallville, and he visits the cave to seek answers from Jor-El. His biological father tells Clark he must reunite the three crystals immediately or an enormous disaster will devastate the planet that even Clark won't be able to stop or survive. Meanwhile, after finding Lana with Genevieve Teague's dead body, Lex helps the teen escape Smallville then takes shocking action to get one of the crystals away from Lionel. Realizing the elements are connected to Clark, Chloe tries to stop Lex from discovering the truth.

Clark discovers that Kara (recurring guest star LAURA VANDERVOORT) sent messages from Krypton in the past that indicate that Brainiac (recurring guest star JAMES MARSTERS) wants to kill baby Kal-El so Clark will not exist in the future. Clark is torn; he thinks the world might be better off if he had never arrived in Smallville. Jor-El arranges for him to see what life would have been like if Clark hadn#t existed: Lex is president of the United States, Kara is raised by the Luthors, Lana is happily married, Chloe and Lois are ace reporters and more.