Alison learns about Billy's wedding, Matt and Paul's relationship takes an unexpected turn, Jane pursues a businessman, and Kimberly takes revenge.

Richard causes trouble for Jane and Sydney, Amanda takes a trip to look into Peter's secret past and Kimberly fights to stay alive.

The Jane-Sydney-Richard triangle comes to a shocking end, Peter is set free and Billy plans a surprise party for Alison.

Jake and Alison hide their relationship from Billy and drug-addicted Matt steals Michael's prescription pad.