Foul Lady Fortune by Chloe Gong

In 1931, Shanghai is a city rife with political tension, divided among Nationalists, Communists, and foreign powers. Rosalind Lang, a former assassin brought back from the brink of death, now possesses immortality and the ability to heal from any wound. Operating under the code "Fortune," she works covertly for the Nationalist government.

When a series of mysterious murders threatens the city's fragile peace, Rosalind is assigned to uncover the truth. To maintain her cover, she must pose as the wife of Orion Hong, a charismatic Nationalist spy with secrets of his own. As they delve deeper into the investigation, the duo uncovers a complex web of conspiracies that challenge their loyalties and threaten to unravel the city's stability.