Ah, yes. The darkest of nights and the reflection of a casting light. In Shadow lies the powers of stealth and silence, the ultimate tool for a secretive victory.
The PCs are stuck in a town with a strict peace policy, the tiniest scuffle can land you years in prison. The town also happens to be a tourist haven, so inn-prices have skyrocketed. The only way the PCs can rest is if they splurge on a room, with their enemy.