A nun who is immortal
tries not to crack and kill someone because of their sins
eventually she does, and she takes the victims faces so she can hide her identity
she falls in love with a rabbi who is married
hes a psychopath and she eventually kills him and falls in love with his wife
she lives (no exit - this is her eternal hell) although she tries to kill herself
what constitutes sin changes, and so do her victims; each victim represents a sin of the age