Catharsis tells the story of Ai, a young immortal who can't escape her past. On her adventure she meets Yuri, an extroverted shapeshifter and Raven, an enigmatic illusionist.
Together the three set out to right what's wrong. The world is being controlled by a cult called the Englowed and their leader, Apollo. Apollo uses a method of mind control to take away magicians' abilities.
Because of this magic-wielders have retreated to the forests where they hide.
Now Ai wants to change things, but will it be for the better?