During a show by rock band THE SUBWAYS, Taylor's behavior causes a major rift between Seth and Summer. Marissa is determined to end the conflict between Ryan and Volchok.
Kaitlin stirs up trouble for the gang as she prepares to celebrate her birthday. Sandy encourages Seth about college, but Seth finds a better alternative.
The senior prom brings out the best and the worst in everyone. When Taylor's prom funds are discovered to be missing, Ryan returns to his old ways, and prom night turns brutal.
