The streets of New York are brimming with secrets, and discovering the truth means navigating danger, deception, and an unexpected romance.

Ivy Malone, a New-York Historical Society librarian, is dedicated to preserving Manhattan's rich history, but when society grand dame Adeline King anonymously reveals her shocking life story, Ivy finds herself holding a highly coveted secret. Burdened with the responsibility of keeping Adeline's identity hidden, the matter grows increasingly complicated when two men claim ties to the elderly woman--one of them accusing Adeline of involvement in a crime.

Another dilemma brews when Ivy's Italian cousin, Gina, is detained at Ellis Island for lack of proper documentation. Hoping an immigration service can resolve the misunderstanding, Ivy employs their help but is instead thrust into a dangerous world. With time running out, she must unravel the tangle of secrets that bind Adeline's past, Gina's freedom, and her own safety. Who can she trust, and how far is she willing to go to protect those she loves?