After learning a disturbing rumor in Appleoosa about Pinkie Pie, Igneous Rock Pie takes it upon himself to restore his daughter's reputation in the town by any means necessary! He will need to consult Marble and Limestone Pie to learn more about Pinkie's way of spreading love and cheer. Not all is at it seems for the Pie Sisters, as it's that time of the month again ~ the girls are in heat and it's up to nopony else but their own father to quench their lustful urges.