After a possible Chantal sighting, Dory becomes obsessed with finding out what happened to her. The show builds a legitimately suspenseful mystery subplot involving a shady private investigator (Ron Livingston), a possibly unhinged conspiracy theorist (Rosie Perez) and a suspected cult. But the story is really about Dory finding herself, even as her friends question why she cares so much about someone she barely knows. She has put herself at the center of someone else's tragedy. Dory's amateur sleuthing gives her an outlet for her time and energy, but her curiosity also comes from a place of genuine compassion - and fear about what would happen if she were the one missing.