The not-quite-a-mission

If the characters were involved in taking down the murderer, possibly saving one or more colleagues, the bigwigs congratulate them and reward them with a little job (shame that overtime isn't in host contracts).

Sforza wants to help eliminate the threat to the security of Dungeon, Inc. that is that possessing creature. She promises backup as the team follows the trail down. Even if they do not mention floor -13, someone else around will recognize the murderer and mention it to her. She hands the PCs a single Δ8 health potion she's got on her. PCs may take any equipment they own with them, and other concerned hosts will contribute to those who own nothing. Roll once on the weapons table for PCs who don't own their weapons.

What if they steered away from trouble? You know your players best. If being the team conveniently tasked to follow the blood parasite would feel like a railroad to them, let them be and prep another mission for next session. Of course, the employee of the month's team is the one that saves the day.