Petrified at Alderth Keep

From publisher blurb: Petrified at Alderth Keep is a Fifth Edition adventure for 3 to 7 characters of 4th to 5th level, and is optimized for 4 characters with an average party level (APL) of 4. Characters who survive this adventure should earn one-third of the XP required to reach the 5th level. The characters are tasked with clearing out hostile creatures from the location so that it is safe for potential rehabilitation. BACKGROUND Alderth Keep was once the esteemed home of Irene Alderth, a human woman. She accrued considerable wealth as a merchant before commissioning Alderth Keep, where she intended to retire. Unfortunately, at some point during the keep’s history it was besieged by a basilisk, which petrified the occupants and has lived at the estate since. After the attack, the keep fell into ruin. The basilisk’s presence has scared off most nearby wildlife, with the exception of the uncowed cockatrices.