"I will be here for you always, Alicia," Edmund promised. "I hope you know that."
Two weeks before their wedding day, Alicia Barlett's fiancé, Edmund Pembroke, is struck down by cholera. As his condition deteriorates, he reveals his dying wish is to see Sweetheart's Lake one last time with Alicia, where he later dies in her arms.
Left with memories and a broken heart, Alicia visits the lake whenever she feels sad or lonely. She imagines she can see Edmund's reflection in the water, and as she reminisces and confides her sorrows, she can even hear his voice speaking back to her, promising to always be there to comfort her.
After four years of mourning and recovery, Alicia marries a dashing young physician, Dr. Hilary St. John. But it seems her happily ever after is doomed to fail once again when accusations of treason lead to Hilary's sudden detainment in the Tower of London. In her despair, Alicia dreams of Edmund urging her to visit him at the lake and warning that both her and her husband are in grave danger.
Is this vision simply the result of a desperate wish? Or is her dead fiancé truly reaching out from beyond the grave to keep a promise? In any case, can Alicia take the chance that she may have to say goodbye to her love for a second time?