From publisher blurb:
Avalon’s Solo Adventure system is a way for you to play 5e D&D by yourself, where you get to control a party of adventurers as they seek out glory and great deeds. In this supplement, you can play out various side adventures for fun and profit. All short one-shots, each is a self-contained adventure to flavor your solo adventures.
Join the King’s Guard, the elite force under the direct command of the royal family of Feldhold. Guard the King, protect the realm, and make sure that all dangers that you face are defeated in the name of the King.
King’s Guard is a first of two books in this series of solo adventures for use with Avalon’s Solo Adventure system. This is not a stand-alone game; you will need the core AsA system to play these adventures.