Working as an ordinary harbor cleaner, Grace stumbles upon a mysterious antique bottle that forms a supernatural conduit across time to Tristan, a seventeenth-century naval commander stranded on treacherous seas. Learning of the captain's starving crew, Grace begins passing modern rations, antibiotics, and advanced tactical tools through the temporal portal. Revering her as a benevolent guardian angel, Tristan returns priceless historical treasures, transforming the humble dock worker into an overnight millionaire. As an impossible romance blooms across centuries, their temporal bridge suddenly shatters, leaving Grace desperate to preserve Tristan's survival while dealing with the unforeseen ripple effects altering the fabric of history.