In The Guardian & Her Captain: Agatha & Bonnie, a story of hate and love, (Jimson Murders Volume1), Dr. Sophie Jimson delivers a young woman's baby in the rear of a taxi. Shortly after, the doctor is murdered by a phantom man that witnesses can't describe. The Phantom, with the newborn in his arms, escapes, but an off-duty policewoman, Lieutenant Agatha Crist, grabs the baby from him. The baby is returned to the mother and the policewoman is hailed as a hero for rescuing the child.
Agatha soon finds out that Dr. Jimson happens to be her fraternal twin. They were supposed to meet for the first time to end their lifelong estrangement. Agatha is distraught and insists on being part of the murder investigation team, despite her captain's objections. As the investigation proceeds, it becomes clear the lieutenant needs as much protection as the new mother. The lieutenant's supervisor, Captain Bonnie Smyth, steps into the case to protect both women. As the two women bump heads, sparks fly. Will they fall in love or continue the hatred they've been exposed to for generations?