Veronica searches for a friend's missing sister who disappeared shortly after attending a bachelorette party and is supposed to get married in three days; Keith tells Sheriff Lamb that Veronica found explosives in the hangar where Terrance keeps his cars; Logan is offered a plea bargain that would drastically reduce his time in prison; Kendall visits Aaron Echolls in prison and Echolls blames Lilly Kane's death on Duncan.