With a newborn and two children, Molly Murphy Sullivan is tackling motherhood. Her husband, Daniel, is off to work in Washington as Easter break begins in New York. Her dear friend and writer, Ryan O’Hara, is shooting a movie and invites her and the children to visit the set. When one of the actresses is fired, Molly’s adopted daughter, Bridie, is called to replace her in the scene. It turns out she is a natural and is asked to star in the rest of the film. The movie industry is still experimenting with ways to get the best shot. But soon, their special effects start to malfunction. After a few mishaps where no one is hurt, the special effects turn deadly. With rumors of a feud between studios, Molly believes these malfunctions are sabotage. She is invited to go undercover on set to investigate the burgeoning film war.

New York, 1908: The days are getting longer --- and warmer --- in Manhattan. Molly Murphy Sullivan doesn’t want to leave her home in the city, but typhoid is back, and she’s expecting. So she heads north with the children to summer with her mother-in-law in Westchester County. Her great friends, Sid and Gus, are headed to the Catskills to visit Sid’s family. Though her mother-in-law is a surprisingly excellent host, Molly quickly grows bored. And when Sid and Gus invite her to visit, Molly jumps at the chance to stay with them at an artist’s community. But Sid isn’t so enthusiastic about having to visit her family in the nearby Jewish bungalow community. Deep in the Catskills, tensions are running high, and it’s not long before a body delays Molly’s return to Westchester.

Former private detective Molly Murphy Sullivan and her policeman husband, Daniel, have built quite a life for themselves in Greenwich Village. They have a good marriage, a true partnership where they value each other’s opinions in all things. So when he tells her they’re moving to a fancy home on Fifth Avenue --- and that he’s running for the sheriff of New York --- Molly is left reeling. Daniel begs Molly to trust him. But why would he run for sheriff on the Tammany ticket? A party known more for kickbacks and quid pro quo than anything else, it used to be everything Daniel despised. So what’s changed? And why didn’t he discuss it with her beforehand? Molly can’t help but wonder what Daniel has gotten himself tangled up in…and if he needs her help to get out.

Now that she’s no longer a private detective, Molly Murphy Sullivan is looking forward to a time of settled tranquility with friends and family. Back in New York, where her own story began, Molly decides to accompany some friends to Ellis Island to help distribute clothing to those in need. This journey quickly stirs up memories for Molly. That evening, her policeman husband, Daniel, comes home with a tale to tell: there was a murder on Ellis Island that day, and the main suspect is the spitting image of Molly. The circumstances are eerily similar to when Molly herself arrived on Ellis Island, and she can’t help but feel a sense of fate. Molly was meant to be there that day so that she can clear this woman’s name.