The Fox and the Wolf

Kira learns that her mother is actually a Kitsune who is close to 900 years old. During the second world war, she was in a Japanese internment camp, and fell in love with a young medic. A riot breaks out, and the medic is badly burned by a molotov cocktail thrown. Noshiko, assumed to be dead but actually healing and unable to move, calls upon a Nogitsune to possess her so that she can have her revenge, but it possesses her lover's body instead. Kira, as a Thunder Kitsune, is able to mend the broken katana, and her mother gives it to her to stop the Nogitsune once again. Noshiko reveals that she hid the Nogitsune in the roots of the nemeton, meaning that Scott and his friends may have been responsible for the reawakening of the Nogitsune. Derek, Chris, Allison and Sheriff Stilinski try to track down Stiles, hoping to bring him back to normal.