The story takes place in a filthy bar owned by Eddie Battito. Roger has stolen a million dollars worth of loan money from a science corporation he had previously worked for and is planning to leave for Mexico City to start a new life. But after a small argument with his landlord, Eddie, he remembers a little trinket that he gotten in his early childhood: a bug-like locket that belonged to his dead mother. Upon its discovery, the locket transforms Roger's soul into a cockroach, and transports him to a mysterious sewer system connected to every section of the bar. As the roach (Roger) explores a world filled with danger at every turn, including rats, garbage disposals, and his own pet cat, Franz, he is constantly being guided by an oracle (who happens to be his mother).
