The episode centers on the ghost of a young girl named , who died from leukemia. She is revealed to be the creator of the "Sally Stitch" email chain—a digital urban legend Melinda encountered earlier in the season.
: Julia befriends Aiden and hides in his closet, eventually threatening Melinda to stay away from her son. [S5E9] Lost in the Shadows
: Julia leads Aiden away, causing him to go missing. Melinda soon discovers that Julia is not acting out of pure malice; she is terrified of "the shadows" that are attacking her and other ghost children. The episode centers on the ghost of a
: "Lost in the Shadows" serves as a major building block for the season-long arc regarding the Shadows—the primary antagonists of the final season who feed on the souls of children. : Julia leads Aiden away, causing him to go missing