Riddled

                                    

                                          
Scott's phone vibrates, waking him up. It's Stiles. At first he only hears breathing, but then Stiles whispers a terrified, "Scott?" Stiles is terrified, and he tells Scott that he doesn't know where he is or how he got there. Scott asks Stiles to describes what he can see, but it's dark and he can't see much.
                          

                          
The line drops. Scott calls back twice, getting voicemail each time. He gets more and more agitated and waits for Stiles to call back. When he does, Stiles tells him that he can't move. "Something's wrong with my leg. It's stuck on something. And it's . . .  I think it's bleeding." 
                          

                          
Scott keeps asking if Stiles is there and if he can hear him. Stiles says there's a smell where he is that's so brutal it's making his eyes water. Scott wants to call the Sheriff, but Stiles begs him not to. He says that his dad has been so worried already. Scott won't promise not to call the Sheriff because he's not sure if he'll be able to find Stiles on his own. 
                          

                          
Stiles hangs up, telling Scott he'll call right back. Scott starts throwing on clothes and yells for Isaac to wake up. Isaac comes rushing in and asks what's wrong. Scott tells him to get dressed because something's wrong with Stiles. "What's wrong with Stiles?" "I don't know."
                          

                          
At the school, Lydia is in the art room sketching Aiden, who volunteered to be her model. He rolls his neck and drops his pose. "I said hold still," Lydia tells him. Aiden wonders if they're allowed in the school that late, and Lydia explains that with so many murders happening at the school they can't even find someone to take a late night security shift. "So we're all alone?" Aiden asks with a smile. Sitting around fully clothed wasn't what Aiden had in mind when Lydia asked him to model for her. He takes off his shirt and resumes his pose. 
                          

                          
Lydia grins at him. "If you're thinking nude modelling, it's usually done without the pants," she says. And next thing she hears is his zipper coming down. Aiden starts to take his underwear off too, but Lydia hears voices. She stares at the radio and hears Stiles begging someone to come find him. 
                          

                          
As Scott and Isaac are running out of the house, Scott's phone rings again. Stiles asks if Scott called his dad. Scott reports that it's just him and Isaac. He asks Stiles again for details about where he is. "It's a basement. I think . . . I think I'm in some kind of basement." It's big, so he thinks it's industrial. There's a furnace, but it's cold. Stiles says that he has to turn the phone off because it's going to die. Then Scott realizes something. "Stiles, why are you whispering?" "Because I think there's someone in here with me," Stiles replies, his voice shaking.
                          

                          
Kira is at home studying. Her lightbulb goes out, and she calls for her mom to come replace it. When Kira touches the bulb, it briefly lights again. She does it more deliberately the second time, energy flowing out of her fingertips and into the bulb. When she touches the glass, it explodes. 
                          

                          
Mama Yukimura comes in and asks Kira what she did. Kira tries to cover for herself, and her mother tells her she should be asleep because it's after midnight. She replaces the bulb, and a little electricity bleeds off of her into the bulb. They both pretend they didn't notice it. 
                          

                          
Scott and Isaac go to Stiles's room and find Lydia and Aiden already there. Scott asks her if Stiles called her, too. "I heard it," Lydia says. Aiden tells them not to ask because it gets more confusing when you ask. "Not as confusing as this," Lydia says and turns so they all can see that the red cords from Stiles's evidence board have been tied to a pair of scissors impaled in his mattress. She explains that Stiles uses red for unsolved cases. "Maybe he think he's part of an unsolved case," Aiden offers. "Or is an unsolved case," Isaac says.