Lindsey returns to Tree Hill for Jamie's fifth birthday party, giving Lucas hope for their relationship. Brooke and Peyton prepare for life with a new baby. Meanwhile, Dan tries to insinuate himself back into the lives of his family, ultimately divulging a grave secret to Nathan and Haley.

Lucas is crushed by devastating news, while Brooke's baby undergoes emergency surgery. Haley wrestles with her decision to record a new album. Skills and Nathan employ a risky game plan to salvage the Raven's season and Lucas stuns Peyton with a shocking truth.