Roy's son, Oliver doesn't know his mother's identity. When he tries to find his mother, he gets into a series of tragic events. Meanwhile, Drachma is planning to attack Amestris in next 1 month, and an internal Ishvalan rebel group is creating chaos in the country.

Few months after promised day, Roy enters his office with a kid and shocks everyone by saying that the kid is his son (Oliver). Still no one knows about Oliver's mother until something really bad happens. Meanwhile, Amestris is facing danger from Drachma and internal group of Ishvalan militants trying to make Ishval a free country. royai