The episode centers on a string of attacks against Lana Lang and Jason Teague by an unseen assailant. Due to her history of obsession and teleportation powers, Alicia Baker is immediately branded as the prime suspect by the town—and eventually by Clark himself. Key plot developments include:
Hurt by Clark's lack of trust, Alicia arranges for Chloe Sullivan to witness Clark using his super-strength to stop a car, hoping that exposing his secret will "free" him from the burden of hiding.
It is revealed that Tim Westcott, a student with sand-manipulation powers, is the real culprit. Seeking to "purify" the town, he murders Alicia and hangs her in a barn.
Blocked Drains Ipswich