Silverfinger

                                    

                                          
Chris Argent remembers a fight that left many people slaughtered.  The Oni were killing everyone, and the only reason he appears to have escaped is that he was underneath the dead body of a colleague. 
                          

                          
Scott is at the Argents' apartment, telling Chris about his encounter with the Oni at Derek's loft. Chris says there was something ritualistic about the way the Oni looked into his soul. Isaac agrees with that assessment. They say that the Oni go after anyone with a connection to the supernatural. Isaac asks who the guy was in Japan that Chris saw them go after. 
                          

                          
It was a yakuza boss, Chris's first gun deal. He was only 18. It was supposed to be a simple exchange, except Gerard didn't tell him that the buyers were yakuza. Gerard wanted to see him adapt to the moment and test his ability to improvise. 
                          

                          
The moment the sun went down, the Oni materialized. They had swords that weren't curved like katanas but were instead straight black steel, ninjatō. The Oni were after the Kumichō, or boss. The yakuza henchmen riddled the Oni with bullets, but that didn't stop their onslaught.
                          

                          
Isaac asks if the Oni marked the Kumichō like they marked the rest of them. "Not exactly." The Oni gathered around the boss, who was some sort of supernatural creature, and impaled him with their swords. They lifted him off the ground, and the boss spewed blood.
                          

                          
Chris doesn't know what sort of creature the boss was, but he thinks another survivor, a man named Katashi, might know. He's called Silverfinger because of unusual prosthetic. Katashi was going to take on the Oni himself, but Chris got up and shot one of them. 
                          

                          
He's known for a while that Katashi is in the country, "I spent yesterday tracking him down." Isaac points to the gash that Allison just finished stitching. "Didn't look like he wanted to be found." Scott asks if Katashi knows what the masked creatures are or what they want. Chris isn't sure. Isaac asks what he'll do if Katashidoesn't remember him. "He'll remember this," Chris replies and shows them the broken Oni mask.
                          

                          
He says that he didn't kill it and he isn't sure that you can, but shooting off its mask did slow it down. "What was behind the mask?" Scott asks. "Darkness. Absolute darkness."
                          

                          
Kira sneaks into her room, trying not to make a sound. She lays down and remembers Scott bringing her home. He asks her if she's okay. "So... all of your friends are...?" "Yeah." "And you're a..." "Yeah." She touches his shoulder as she gets off the bike and then asks him if she can see him wolf out. He checks that the street is empty, then closes the visor on his helmet and shifts before taking the helmet off. 
                          

                          
Kira touches his face with wonder. 
                          

                          
Scott is riding his bike to school, when the twins drive up on either side of him. Scott looks at them both and then pours on the speed. They speed after him. When they arrive at school and take their helmets off, Scott asks them if they're going to following him all day. "All day." "All night." Scott asks if it's about being in his pack, "It's about you being the target of demonic ninjas," Aiden says. Scott tells them that he doesn't need protection, but Ethan counters that they were looking right at him when the sun came up. Chris think the Oniare only able to come out at night, but Ethan says that since this is their first encounter with demonic ninjas they should play it safe. 
                          

                          
Scott resigns himself to the twins following him around. He tells them that he has to talk to Stiles without them around. Aiden objects, but Scott insists that that's how it's going to be. And the twins aren't going to listen in. "How would you even know?" "I'm a True Alpha, you have no idea what I can do."