Mustang, Alphonse, Havoc, and Hawkeye split up to search a military laboratory. If Lust has her way, none of them will ever see each other alive again.

After investigating the twisted roots of the Bradley family tree, Mustang gathers his most loyal troops. Meanwhile, Ed and his allies continue fighting Selim, who shocks everyone by turning on his own kind.

A truly epic battle erupts when Edward, Mustang, Hawkeye, Greed, Izumi, and Armstrong attack the god-like Father. The odds are against the forces of good - until one brave boy makes a shocking sacrifice.