Lucas (Chad Michael Murray) awaits Brooke's (Sophia Bush) return to Tree Hill after a summer spent with Peyton (Hilarie Burton.) Peyton investigates the mysterious woman who claims to be her mother while Nathan (James Lafferty) must deal with Haley's (Bethany Joy Lenz) reappearance at the same time as the fire at Scott Motors. Dan's (Paul Johansson) fate after the fire is revealed.