In Japan in the year 1600, at the dawn of a century-defining civil war, Lord Yoshii Toranaga is fighting for his life as his enemies on the Council of Regents unite against him, when a mysterious European ship is found marooned in a nearby fishing village.

Eight students are in lockdown at their college dorm following a global pandemic, unable to connect to the outside world. They soon realize they are victims of a far more sinister and unexpected entity.