I agree, there should be a mission explanation but it is absent. From context it clearly should be there, even looking at the continuing context in following chapters.
I said it last time but since the original comment section is gone now I'll say it here as well.
Lindwurm Has shown here an extremely unprofessional and rude demeanor here, they barged into a private meeting and than tried laying hands on another guilds member, and that one was there to clean up Lindwurms mess after they fucked up.