Lydia Jansen is happily married to a young customs inspector, but she harbors a dark secret. She is addicted to smoking opium or in slang parlance “hop.” To keep her secret, she willingly pays the blackmail her maid extorts from her having learned of Lydia’s habit through her own fiancée who is part of the ring importing the devil’s brew. Something unknown to all is that the operation is run by Lydia’s father an important politician in the city where this all occurs. As her husband’s investigation tightens the noose on the organization Lydia faces a crisis.