Shadow Spade has always been a private detective, letting her clients come to her to provide the cases she needs to solve. However, one night she gets caught up in a murder disguised as a suicide, and now she has no choice but to work alongside the police with a somewhat brash detective. With each case, Spade's skills will be put to the test, along with her new partnership as she slowly pieces together a dark secret that involves and could jeopardize the entire Canterlot Police Department.