From publisher blurb:
The Planarch Vault
You’ve just landed on the Planarch Vault, a sky-fortress built to hold criminals too dangerous to simply kill. It’s guarded by a team of wardens, mighty warriors each – but last week they didn’t report in. You’ve been sent to find out why. Your job is to infiltrate the complex, rescue the wardens if possible, and ensure the vault is secure. (Spoiler alert: it’s not secure.)
The heroes of Daviston died long ago, but their spirits roam restlessly in Havenshine castle. Before the castle topples into the ocean, the party will need to venture within to uncover the mystery of these four warriors!