TOHO released the first teaser trailer for the anime adaptation of Nahoko Uehashi‘s fantasy novel series: Shika no Ō (The Deer King). The teaser introduced the film’s premiere date of September 10, 2021, the main cast, and the full title of the film: Shika no Ō: Yuna to Yakusoku no Tabi (The Deer King: The Promised Journey With Yuna).
The series is described as:
Van is the head of a group of soldiers who expected to die fighting for their lands against a large empire looking to incorporate their home into its kingdom. Instead of dying, however, Van is taken as a slave and thrown into a salt mine. One night, a pack of strange dogs attacks the salt mine, and a mysterious illness breaks out. During the attack, Van takes the opportunity to escape, and he meets a young girl. Elsewhere, rumor is spreading that only immigrants are coming down with this mysterious illness. The medical scientist Hossal risks his life to search for a cure. Doctors also study a father and child who seem to have survived the illness. The novels tell the interconnecting stories and bonds of those who fight against a cruel fate. (via MyAnimeList/Anime News Network)