The team leads a class of college students through the nearly 20-year chase for a serial killer.
Rosewood and Villa investigate the murder of a woman whose body was found frozen solid; Villa's brother meets the important people in her life but isn't ready to have a reunion with his mother.
Leanne defies Campbell's order and uses the hospital helicopter to reunite a family for the last time. Meanwhile, Willis and Loa use a cell phone app to communicate with an autistic young girl.