Rise of The Guardians: The Return of Pitch Black

A fallen angel, trying to escape from the darkness. And a certain person gets her away from it. When she finally does, an organization pulls her to work for them. She, is the Angel of Darkness, she is the daughter of Pitch Black, a former enemy of the guardians. Here Jack Frost has a part of his past that he never knew until Dark appeared. Will Dark ever escape from the darkness? And will she and the guardians stop from this organization and what Pitch has been planning?