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!
This information comes from 
a well-connected source.
صدرت هذه المعلومة من مصدر له 
.علاقات مع ذوي النّفوذ
Die Quelle dieser Information
ist vertrauenswürdig.
Lo sabemos
gracias a sus círculos cercanos.
Lo sabemos
gracias a sus círculos cercanos.
Une information de source fiable
L'informazione proviene 
da una fonte con ottimi agganci.
É uma informação de uma
fonte com boas conexões.
Информация из надёжного источника.