Libby Lomax's life takes an unexpected turn when a spectral Marilyn Monroe appears, disrupting her newfound happiness and complicated romance. Libby, a struggling actress, finds her world upended by a whirlwind romance with Dillon O'Hara, a man far from stable boyfriend material. Her attempts at a normal life are further complicated by the sudden, inexplicable appearance of Marilyn Monroe on her sofa, offering dubious relationship advice. With her best friend Ollie as her anchor, Libby must navigate this surreal situation and decide whether to heed the advice of a Hollywood icon before her life unravels further.

The premise suggests a lighthearted and humorous romantic comedy, likely appealing to fans of contemporary women's fiction. The inclusion of a historical celebrity figure in a modern setting points to a whimsical and engaging narrative style. The focus on Libby's personal life and romantic entanglements indicates a character-driven plot with an emphasis on relatable struggles. The comparison to authors like Lucy Diamond and Sophie Kinsella further reinforces the expectation of witty dialogue and feel-good storytelling.