Lyric discussion by Novem 

Cover art for Comes With The Fall lyrics by Circle Takes the Square

This song is based on the the bestselling 1967 novel Rosemary's baby by Ira Levin, as well as the 1968 movie of the same name starring Mia Farrow and written and directed by Roman Polanski.
"Comes with the fall." is an anagram for "All of them witches." both are mentioned in the movie and the book amongst other possible solutions to the anagram riddle. The song it self is basically a synopsis of the entire plot of Rosemary's baby.