From publisher blurb:
An adventure for master characters
The Vault of Hope is a legendary museum built, maintained, and guarded by tireless clockwork servants, designed to store the intellectual seeds of civilization until the threat of the Demon Lord is finally vanquished. But now, the actions of a deranged cultist have enabled the corruption of the Demon Lord to enter the museum from the inside, and it’s up to the characters to set things right.
The Measure of a Man is a darkly comic adventure for master characters, who face an easy task routing the perverse cultists that have taken over the Vault of Hope. But the characters soon discover that the debased cult leader Amra and the demonic horde he has summoned are a much greater threat.