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!
It's also known as the 
"ticking time bomb under thin ice."
يُعرف أيضًا بـ"القنبلة الموقوتة 
."تحت الجليد الرّقيق
Eine tickende Zeitbombe,
wie manche sagen.
Una delicada bomba de tiempo
que lleva años en paradero desconocido.
Una delicada bomba de relojería
que lleva años en paradero desconocido.
C’est une vraie
bombe à retardement.
È considerato una 
"bomba nascosta sotto a ghiaccio sottile".
Pode ser uma bomba-relógio
numa fina camada de gelo.
«Архив» как неразорвавшаяся бомба.