In a small town surrounded by mountains, a young confectioner discovers that there may be more to life than the four walls she's grown up in.

After a horrific accident resulting in the death of both Igneous Rock Pie and Cloudy Quartz, Marble, Maud, and Limestone Pie set out across Equestria to gather the rest of the Pie family while planning how to break the news to Pinkie Pie.