Allison tells her family that Jackson is the kanima, so they come up with a plan.  Meanwhile, Scott and the crew also come up with a plan.  Neither plan works as the kanima and its master murder yet another person.  Stiles and his father figure out that all of the victims are the same age, and are seemingly from the same class in school.  Unfortunately for Mr. Stilinski, he is put on a leave of absence due to Stiles's recent trouble.  Scott is captured by Mrs. Argent and almost killed, but Derek shows up to save him and bites Mrs. Argent in the process.