After school, Karou and Zuzuna go eat at Poison Kitchen, a cafe populated with statues wearing gas masks. They've even got a history of serving up deadly dishes. Exciting.
Anyway, the two chat about story stuff—scene, backstory, and foreshadowing, of course—until a crow-like little monster named Kishmish shows up with a message for Karou: "Errand requiring immediate attention. Come" (4.38).
Karou has to blow off Zuzuna for the rest of the night, and her friend isn't happy about it. But duty, whatever it may be, calls.