Twelve-year-old Maggie Langley boards the Titanic with her mother, bound for a new life in America where her father awaits. Traveling in the modest comfort of second class, Maggie's journey takes an unexpected turn when she befriends two spirited Irish siblings, Nora and Cian Flanagan, from the bustling world of third class. Together, they explore the ship's grand corridors and forge a bond that defies the barriers of class and circumstance.
Maggie's circle of friends expands when she meets the reserved and thoughtful Thomas Addington, a young boy traveling alone in second class. Together, the four of them navigate the marvels of the Titanic, from the dazzling dining rooms to the lively steerage dances. But when the unthinkable strikes, their budding friendships are tested as they face impossible choices and unforeseen dangers.
As the icy Atlantic looms and the ship's fate becomes clear, Maggie must summon courage she didn't know she had. Will she, her friends, and her mother make it to safety, or will their dreams of reaching America be lost to the depths of the sea?