Lana sees the impossible: a friend named Emily Eve Dinsmore, who died six years earlier in a fatal accident at age 10, and still appears that age. Clark Kent believes Lana and searches for the truth. Emily's father Mr. Dinsmore has an accident provoked by Emily and Lionel Luthor visits him in the hospital. Lana and Clark eventually discover that Emily is the result of a Luthor Corp experiment in accelerated cloning. But problems in her chromosomes have caused her to be a flawed copy, resulting in a bad temper, with the power of super-speed and telekinesis. Meanwhile, Lex Luthor plans his wedding with Helen, while Lionel gives Lex a free airline ticket for a honeymoon in the Caribean, and to tie up some loose ends over the Emily cloning matter, and to take control of the old cave away from Lex.

Clark Kent decides to disclose his secret to Lana to avoid her from traveling to Paris, and he invites her for dinner at the Kent farm. But things take a turn when the dangerous teenager Emily Eve Dinsmore, the six-year-old girl (from the episode 'Accelerate') had matured into a grown-up and still obsessed with Lana, escapes from the institute where she is interned. She kills the new owner of Talon and kidnaps Lana. Meanwhile, Chloe joins forces Lex trying to find evidence to send the powerful Lionel to prison for the murder of Lex's grandparents. Elsewhere, Pete is threatened by the corrupt FBI agent, Frank Loder, who is still trying to find what he knows about Clark. Clark then decides against telling Lana his secret after Pete reveals to Clark about the pain of the ability to keep his secret and Pete decides to move away from Smallville to live with his now-divorced mother in Wichita.