Mrs. Géquil is a teacher despised by her colleagues and students. On a stormy night, she is struck by lightning and faints. When she wakes up, she immediately feels reinvigorated and becomes a better and more engaging teacher overnight, while even bonding with some of the students. Even her sex life with her husband improves. However, there is a downside to this when the moon is full. Will she be able to keep the powerful and dangerous fiery creature dubbed Mrs. Hyde contained and continue to use her newfound creativity and lust for life for good?