A foal offers Applebloom a piece of paper which contains a drawing.

At first surprised, Applebloom is excited when she figures out that the drawing must be a treasure map. She makes it her quest to find the treasure and takes her two friends with her in her new quest, not knowing what is awaiting her on her silly journey and what treasure she is going to discover.

In other words: if the truth is obvious, what isn't?