“Teen Wolf” is keeping the assassins coming in Season 4, episode 9, “Perishable.” In episode 8, the teenagers of Beacon Hills got a break when they tried to fake Scott’s death. It seems that the Benefactor knew that Scott was still alive, and more killers are being sent after him, according to the episode 9 synopsis.

This time, Scott and Liam will once again find it hard to act like normal teenagers. They will be targeted at the lacrosse team’s annual bonfire. Because this is a public setting, the killer will have to get creative. Will someone spike the keg with wolfsbane? Or will they get Scott and Liam alone somehow? There always seems to be an empty hallway around Beacon Hills High.

Meanwhile, Lydia will continue to give up her party girl ways. She’ll be ditching the bonfire in favor of looking into her grandmother’s past. She “uncovers a family secret.” Last episode, Lydia discovered that her grandmother was also a banshee and she might not be dead. Will she track down her grandmother in this episode? It also looks a lot like Lydia’s grandmother might be the Benefactor or at least connected to the Benefactor. Lydia could discover some secrets that are hard to swallow.

 Also, Lydia’s lake house is up for sale, and the realtor is having an open house. She discovered last week that the boathouse there is made entirely of mountain ash. The banshee will have to figure out whatever secrets are hidden in that house fast.

Check out the promo for "Perishable" below:

“Teen Wolf” Season 4 episode 9 will air Monday at 9 p.m. EDT on MTV. What family secret do you think Lydia will discover? Share your theories in the comments section!