Bo agrees to help a Will-o'-the-Wisp (named Will) recover his lost box of gems. Bo and Kenzi track the thief down to a hotel where he's trying to fence the goods. They learn from him that Will is his estranged father when they're interrupted by a headless swordsman (of a race that remove their heads before going into battle). Bo fetches Will to come meet his son, who it turns out wants to expose the truth about the Fae. After Bo takes care of the headless guy for good ... Okay, Kenzi takes care of the headless guy for good, then Will honors his deal with Bo; he tells her about a night 30 years previous, when a midwife carrying a little girl (Bo) ran through his woods...
Tropes featured:
- Disappeared Dad: Will didn't even know he was a father.
- I Hate You, Vampire Dad: If one of the parents is human, the child is human. Sonny-Jim doesn't appreciate this face. Nor the fact that his father was never there and his mother died with everyone thinking she was crazy.
- Running Gag: Will's gas as a metaphor for farts.
- Will-o'-the-Wisp: Will, the Will-of-the-Wisp is a humanoid Fae that has the ability to create bursts of green flames that he uses to lead humans away from his home and treasure.
