Don Alvaro, a young but wise man, invokes Satan in a goetic-style magical ritual. Upon seeing the young Alvaro, Beelzebub falls in love with him and assumes the appearance of a beautiful young woman. In the journey that unfolds, Satan, disguised as a woman, tries to seduce Alvaro who rejects his advances lest he lose his precious virginity. He is unwilling to compromise his honor by sleeping with a woman before they are married, for which he will need his mother's approval.