On Halloween night in 1985, Shawn and Gus witness a troubled girl throw herself from her window at the Wispy Sunny Pines mental institution. From that moment on, "Scary Sherry" has haunted the halls of the now abandoned facility where we find a girl, Doreen Harthan, being chased by what appears to be her ghost through the halls of Wispy Sunny Pines, falling through the same window to her death below.