In Which There Are Some Summarizations
Edward Nygma x MC (female protagonist).
The current boyfriend/fiancé: Edward Nygma.
The ex-boyfriend: Jerome Valeska.
The MC’s mentally unstable and physically violent ex-boyfriend, Jerome Valeska, escapes from Gotham City's Arkham Asylum and kidnaps her from her shared apartment with her loving fiancé, Edward Nygma (whom she mostly and dotingly calls "Eddie").
Edward is devastated to find her missing from their slightly ransacked apartment, and he goes after her (relying on some vague clues that only someone as estute and detail-oriented as he is such could cypher out, which makes him much suited for his job as a forensic scientist at the Gotham City Police Department). Eddie's other side, his "dark" side (which she either mostly calls "Edward" or "Ed"), helps him to track her down and aids him in the more physically violent actions that are necessary to protect her and to defend himself.
When she finally awoke from spending so much time unconscious, she came to realize that she was drugged. She noticed that she was in an old, abandoned, run-down warehouse that was basically falling apart at the seams, and she was tied down to some kind of a cold, mixed-material surface. And there was Jerome, sitting in a chair a few feet away from her and looking awfully pleased with himself ... like the cat that caught the canary.