Sarah Sinclair, an assistant attorney in the Crown Prosecution Service, begins her career under prosecutor Monica Campbell. When Monica dies abruptly during a high-profile case against the LIVE Corporation, Sarah suspects murder and vows to unravel the truth. Teaming with SSC agent James Blood, she probes a conspiracy involving experimental masks—biotechnological devices enabling superhuman abilities—and their ties to Monica’s demise.

Her shoulder-length brown hair is frequently braided, complementing a practical wardrobe of a white turtleneck, orange coat, and black pants. She employs a meticulous approach, methodically charting connections between suspects and evidence on a sprawling whiteboard laced with strings and annotated notes.

Allied with SSC technical specialist Edmond Chandler and investigator Oliver Henderson, Sarah traces clandestine ties among LIVE Corporation, the masks, and Monica’s death. Despite mounting personal risks and external pressure to abandon the case, her relentless focus fuels the inquiry.

As the conspiracy expands into corporate power struggles over mask prototypes, the narrative shifts toward broader conflicts. While Sarah remains a steadfast investigator, her direct involvement in resolving the central confrontation recedes, with no elaboration on her personal evolution beyond her tenacious pursuit of justice.

No additional details explore her background, familial ties, or potential appearances in extended media narratives.