Shadow Hearts: Covenant is a direct continuation of Shadow Hearts; Its story starts a year and a half after the first one in the midst of World War I. It focuses on Karin Koenig, a lieutenant in the German Army who assists in the exorcism of a man able to turn into demons, Yuri Volte Hyuga. However, after learning of Yuri's caring nature, Karin goes on a quest with him to save him from a spell inside him and are drawn into a conflict involving demons of demonolatry.

Shadow Hearts: Covenant is a direct continuation of Shadow Hearts; Its story starts a year and a half after the first one in the midst of World War I. It focuses on Karin Koenig, a lieutenant in the German Army who assists in the exorcism of a man able to turn into demons, Yuri Volte Hyuga. However, after learning of Yuri's caring nature, Karin goes on a quest with him to save him from a spell inside him and are drawn into a conflict involving demons of demonolatry.