this story features characters from the Chicago franchise, including the main characters from Chicago PD, as well as many from Chicago Med and Chicago Fire. the following characters feature most prominently, including the main original character.

Detective Imogen Adler

Detective Jay Halstead

Doctor Will Halstead

Officer Adam "Ruz" Ruzek

Detective Hailey Upton

Officer Kevin "Kev" Atwater

Doctor Connor Rhodes

Nurse Maggie Lockwood

Sylvie Brett

Christopher Herrmann