Clark is confronted with a crucial decision about his future; Lex and Helen's wedding is put in jeopardy; Chloe confronts Clark about his relationship with Lana.

What's up with Clark? The spaceship that brought Clark to Earth begins to speak to him. The ship claims it is the memory of Clark's biological father, Jor-El. It explains to Clark that his true name is Kal-El and that it's time for him to leave Smallville and accept his destiny. The next morning, Clark tells his parents what happened and they tell him only he can decide his destiny. The next night the ship speaks to Clark again, and again Clark says he will not obey it's orders. The ship becomes enraged and hurls Clark against the wall and the proceeds to burn "the mark of his ancestors" on his chest (It's a pentagon with an 8 in the middle. The Superman emblem, except with an 8 instead of an S). It then tells him that if he doesn't follow his orders by noon, everyone that he loves will be hurt.

What's up with Lex? Lex finds Helen talking to Lionel in a hallway. It appears that Helen is giving an envelope to Lionel. When Lex inquires as to what's going on, Lionel says Helen is refusing a wedding gift and walks away. Lex then professes to Helen that he was the one that ransacked her office and stole Clark's blood. Helen is aghast and calls off the wedding. Lex tells Clark the wedding is off, but asks him not to tell anyone so he can "hold on to his romantic notions for one more day." What's up with Lionel? Clark heads to the cave when he hears that Lionel has set up special equipment. Lionel finds Clark there and tells him he thinks he can unlock the secrets in the cave walls. He says the advantage he has over Dr. Walden is that he has the key. When Clark reminds him that the key was stolen from his safe, Lionel says he's made a new one from material from one of the meteors (kryptonite).

What's up with Pete? Clark refuses to tell his parents that he's still hearing voices from the ship and sends them off to Lex's wedding. The only one he confides in is Pete. He informs Pete about his plan to destroy the ship by stealing Lionel's kryptonite key and placing it in the ship. Pete reluctantly agrees to help Clark and runs interference while Clark steals the key.

What's up with the Kents? The wedding is all set to happen, except Lex is missing his best man. He asks Martha and Jonathan where Clark is. When Lana arrives without Clark, the Kents are worried and tell Lex to start the wedding as they speed home. As they're driving back to the farm, Clark uses the last of his energy to place the key in the ship. The reaction is a violent explosion that destroys the storm cellar and topples the Kents truck as they pull into the driveway. Martha is rushed to the hospital where the doctor tells Jonathan and Clark that she'll be fine, but her unborn child didn't survive. Jonathan is furious at Clark for lying to them and not consulting them before he took action. He turns away from Clark and heads to console Martha.

What's up with Lana? Lana and Clark's relationship really heats up and both seem completely in love with the other. After the wedding, Lana rushes to the farm where she finds Clark distraught and in shock. He tells her about how his mom lost the baby, and tells her to go away before he hurts her too. She tires to console him but he'll have none of it. He puts on a red kryptonite ring he stole from Chloe's office and jumps on a motorcycle. He tells Lana he's leaving Smallville and asks her to come with him. Lana refuses and Clark takes off leaving Lana and Smallville behind.

What's up with Chloe? Chloe finds out about Lana and Clark and is angry at Clark for not telling her about it. She's so upset she meets with Lionel and tells him she'll investigate Clark. As Chloe leaves the meeting with Lionel, he takes out the envelope that was supposedly his wedding gift to Helen and twirls it ominously in his hand.

What's up with Helen? Helen comes back just in time for the wedding. She tells Lex that even though what he did is unforgivable, she wants it to work. After the ceremony, the two newlyweds take off on Lex's private jet. They toast champagne and Helen slyly looks at Lex as he drinks his champagne. Lex soon passes out and when he awakes he finds he's the only one left on the plane. He opens the cockpit door in time to watch as the plane crashes into a large body of water.