Asher's part of
Game of Thrones: Episode 5- A Nest of Vipers actually wraps up his story in Essos. Before the end of this episode, he will have his fighters and he will make his way back to Westeros. Unfortunately, it won't exactly be the Second Sons like he was hoping. Then again, that was kind of expected since Daenerys still has them on hand far into her reign on Meereen. Why does she deny you? What has caused this change in behavior? Well, that depends on some choices you made in the last episode and how you answer her questions about the events that just transpired.
Regardless, Asher must find a new group of people willing to fight for the Forresters, and Beskha has an idea of where to go. Unfortunately, the band of fighters she has in mind aren't likely to follow a new master, and Asher will have to earn their trust, not only in combat, but with a rousing speech that will hopefully play on this particular group's fancies.