On one of the last nights of 1999, Krystal is tucking herself into bed after a fun sleepover with her best friend Katie, but they are suddenly woken up by a window creaking open. As Krystal opens her eyes, a man holds a knife to Katie’s neck near the edge of the bunk bed. From that moment on, two things are on Krystal’s mind: surviving through the night, and making sure serial killer Tommy Lynn Sells is brought to justice.