After long years of being a slave in Zebrica (it's been a few months since they last played pirates), Captain Dinky has escaped her bonds (is free this weekend), and has returned to the sea with her loyal crew (Scootaloo, Twist, Featherweight, and Snails). But she does not come empty-hooved: she has part of the legendary map that leads to the fabled Lost Treasure of the pirate Espada Noche (which is apparently somewhere in town)! Now, Dinky and her band must battle rival pirates (Pipsqueak, Applebloom, Rumble, Snips, and Bee Bop), and the Royal Equestrian Navy (Diamond Tiara, Silver Spoon, Alula, Sweetie Bell, and Firelock) in order to follow the map to the ultimate treasure!