From publisher blurb:
GC1 It Lurks Below: A mournful girl has begged you for aid.
Her father, keeper of the city’s vast sewer system, has disappeared. The city guard will do nothing and she suspects foul play or something even more sinister.
An adventure is at hand and only one thing is certain, It Lurks Below!
It Lurks Below is an adventure for four to eight first level characters using the Fifth Edition game rules.
GC2 They Lurk Below: A young mother begs for help. Her daughter has been kidnapped by a group of foul men who have fled into the sewers. One of the kidnappers scowled as he fled, “This one is the perfect sacrifice!”
They Lurk Below is an adventure for four to eight second level characters using the Fifth Edition game rules.