Araragi-kun keeps investigating while having conversations about deep topics like justice and family. Sometimes it’s hard to keep track of all these themes, but there’s a lot of existentialism behind them.
There’s a new guy called Kaiki, who kind of looks like a vampire, and he seems to be connected to someone from the past.
There’s also a lot of dialogue between Araragi-kun and Senjougahara that starts with a lot of nonsense, and suddenly everything shifts into a serious tone.