The first half of this volume deals with the conclusion of the arc begun in volume 4 as the mystery of the missing children is solved with Sakura as an active participant, the culprit turns out not to be who it appeared, and the villain of the situation receives his or her just desserts.
The second half finds the gang in a moment of, for them, relative peace as they reach their next destination and take jobs - Kurogane and Syaoran working as demon hunters while Fai runs a cafe with help from Sakura in hopes of picking up gossip that might help the cause.
This volume solidifies the group dynamics as Fai starts comparing them to a nuclear family by drawing cutesy pictures of Kurogane and Syaoran as father and son puppies and himself and Sakura as mommy and daughter kitties. Obviously there's alot more to him that we're nowhere near finding out yet, but for now he's a riot and it's alot of fun waiting to see what comes out of his mouth next and how far he's going to push Kurogane.
The strange thing is, Fai isn't all that far off the mark. Kurogane has started becoming a fatherly/brotherly mentor to Syaoran, and at times Fai has started acting as an almost maternal/sisterly figure quick to offer physical comfort and always seeming to know the right thing to say to the kids when it counts. In their own, odd way, they really are becoming a family of sorts.