: While visiting Rush Valley for automail repairs, Edward and Alphonse Elric encounter Ling Yao, the 12th Prince of Xing, and his bodyguards, Fu and Lan Fan.

: Ling reveals he is seeking the Philosopher’s Stone to secure his claim to the Xingese throne, as the current Emperor’s health is failing.

: A skirmish erupts between the Elrics and Ling’s group, during which Edward discovers that Alphonse has gained the ability to perform transmutation without a circle. Thematic Analysis

The episode highlights the cultural and political differences in how alchemy is used. In Amestris, it is a tool of the military, whereas in Xing, it is primarily used for medicine. This contrast underscores the militaristic nature of Amestris under Fuhrer Bradley. English Dub Details

: The episode introduces May Chang, a young girl from Xing traveling with her small panda, Shao May. She utilizes Alkahestry (Rentanjutsu), a unique form of alchemy centered on medical healing and "dragon pulses," contrasting with the more combat-focused alchemy of Amestris.

The 15th episode of Fullmetal Alchemist: Brotherhood , titled , serves as a pivotal world-building chapter that expands the series' scope beyond the borders of Amestris by introducing characters from the neighboring nation of Xing. Episode Plot Summary