The "Lakewood Slasher" lures Emma and her friends to a final confrontation at Brooke’s house and the town's lake. Major Plot Points
This suggests Audrey was Piper's accomplice or at least helped her coming to Lakewood, casting doubt on her "victim" status and setting up the mystery for Season 2. Guide for Viewers
Most of the surviving teenagers gather at Brooke Maddox’s house for an after-party. The killer strikes here, attacking Brooke and trapping her in a freezer. Jake eventually confesses he was the one spying on her via webcam, though he was not the killer. [S1E10] Revelations
Season 2 picks up immediately with the "Lakewood Six" dealing with the aftermath and a new killer emerging who knows Audrey’s secret. The Rewatch Recap | RedCircle
Piper reveals she is the biological daughter of Maggie Duval and Brandon James, making her Emma’s half-sister. She was given up for adoption and grew up resentful of Emma’s "perfect" life while she felt abandoned. The "Lakewood Slasher" lures Emma and her friends
After a struggle on the dock, Emma shoots Piper in the forehead, ending the immediate threat. The "Revelations" Cliffhanger
In a gruesome turn, Sheriff Clark Hudson is found tied to a tree with his intestines literally falling out when Emma tries to untie him—a trap set by the killer. The killer strikes here, attacking Brooke and trapping
It is revealed through old letters that Audrey was in contact with Piper before the killings began.