The secret files called the Zacharis Dossier may cause a war between the East and the West. In order to obtain a painting that is supposed to be the hiding spot for these files, Loid and Fiona enter an underground tennis tournament run by the owner of the painting, Campbell. If they win, the art piece they're after will be presented. Loid and Fiona enter as a married couple and play various skilled players including pro players!
Fantastic, Nightfall! Let us play
doubles in the game of life!
!ممتاز أيّتها المساء! لنلعب كثنائيّ لمدى الحياة
Unglaublich, Nightfall!
¡Fantástico, Nightfall!
¡Fantástico, Nightfall!
Tu es géniale, Nocturna !
Sei incredibile, Nightfall! 
Giochiamo in doppio per tutta la vita!
Fantástico, Nightfall! Vamos jogar em
duplas pelo resto do jogo da vida!
Ты просто нечто, Мглая!
Давай же на всю жизнь станем парой!