Following Sailor Mars' abduction, Sailor Moon notices Chibi-Usa observing the battle. Sailor Moon becomes suspicious of Chibi-Usa's intentions, so Mamoru takes care of Chibi-Usa. Meanwhile, the Black Moon Clan's second Spectre Sister, Berthier, challenges Ami to a chess match: if Ami wins, Berthier will return Sailor Mars. If Berthier wins, Ami gives them "Rabbit" (Chibi-Usa).
Tropes used in this episode:
- Doppelgänger Spin: Mercury uses this against Berthier. It doesn't work.
- Dowsing Device: Berthier uses a pendulum made from a piece of the Malefic Black Crystal as one. It's used extensively during her chess matches to help determine where to move her pieces. When it stops responding, Berthier immediately realizes that Ami will checkmate her on the next turn.
- Gilligan Cut: Chibi-Usa is assured that Sailor Moon is invincible. Cut to a destroyed city.
- I Know What You Fear: Berthier uses these tactics on Ami in an attempt to make her lose the match of chess.
- I Lied: Ami wins the match of chess, but Berthier does not return Mars on account of her having more pawns in the metaphorical sense.
