In the heart of Sonora, a mother's schemes set the stage for her son's Sunday awakening. She invites a friend, eager to introduce him to her son's hidden desires. As the son sleeps, the friend joins him in bed, slowly rousing him with tender touches. The son, initially startled, soon yields to the stranger's skilled advances. The mother, watching from the doorway, films the passionate encounter that culminates in a fiery exchange, leaving both men breathless and spent.