Misadventure at the Merry Marionette (5E)

From publisher blurb: Just in time for Halloween! With this installment in our One & Done adventure series, you and your players can enjoy a scary evening investigating a string of missing children, and finishing off the evil behind the disappearances. A 4th-level adventure designed to be played in a single session, this adventure can be dropped into almost any game with minimal modification. Featuring a new monster (The Collector) and several new magic items, as well as 2 full-size maps for use in your favorite VTT program, this adventure is sure to be a hit at your table.