Changes of circumstance have caused the gang to see less of each other over the years, but they manage to reunite one more time for Ted's wedding. A monumental event in his personal life finally leads Barney to change his ways.
Cheyenne and Mateo ponder whether any of the employees are capable of murder, while Amy spruces up the shop's Halloween efforts, setting up a haunted house that leaves Glenn terrified. Jonah collects union cards.