The Ptolemaios 2 has received a message containing coordinates for a point at Lagrange 5. The crew are suspicious, but Setsuna suggests they set course for this mysterious location. Ian Vashti agrees, since this will enable them to collect new equipment from Celestial Being's nearby secret factory.
It's the only explanation for what happened.
.إنّه التّفسير الوحيد لما حدث
Es la única explicación.
Es la única explicación.
C’est la seule explication.
É a única explicação 
para o que aconteceu.