Rubeus is inside his ship when Emerald appears and tells him that Prince Diamond is going to kick him out in 24 hours because he lost the Negamoon Sisters, hasn't captured Rini, destroyed the Sailor Scouts, or taken over a crystal point yet.
Rini can't believe that Serena is Sailor Moon, and runs off after stealing the Imperium Silver Crystal. However, when she tries to return to the future, it still doesn't work, and when the crescent moon appears on her forehead, Rubeus attacks her, but Sailor Mercury, Sailor Mars, Sailor Jupiter, and Sailor Venus fight him off. However, when carrying Rini to safety later, Rini reveals that she knows the girls' true identities. Though the Scouts try to talk to her, Rini refuses to listen to them and flees to Darien's apartment for protection. However, when Serena shows up looking for her locket, Rini escapes once more.
Avoiding the Sailor Scouts, Rini is finally able to open a portal to the future, but Rubeus returns and closes the portal with the aid of his Negamoon starship. Sailor Mercury, Sailor Mars, Sailor Jupiter, and Sailor Venus fight him, but an attempt with the Sailor Planet Attack to defeat him fails due to Rubeus being protected by his starship and not having Sailor Moon there to help as well, and he captures them all inside his ship. Serena arrives too late to save them, as Rubeus laughs in triumph.
- First appearance of Emerald
- First mention of Prince Diamond