Revealing the identity and inspiration behind The Ringing World, Jojo reconciles with the past. Duk-gu keeps his end of the bargain.

Park Gul-mi reaches a digital milestone. Brian grills Jojo about the shield, spear and Duk-gu — and shatters reality for a bystanding listener.

With video of his lecture hall visit gone viral, Sun-oh comes to blows with Hye-yeong. Jojo receives a special gift from an unknown sender.

Jojo offers Hye-yeong a shoulder to cry on after a punishing day. Unable to cope with knowledge of the shield, Sun-oh turns to Jojo for the truth.

Jojo asks Brian Chon about the shield at an event attended by the Badge Club members, including Sun-oh. Hye-yeong comes face-to-face with his father.

Curious about her true feelings for Hye-yeong, Jojo returns to her alma mater in search of information on Chon Duk-gu — and runs into her past.