1942 Young Maggie, Kat and Lulu learn to live in difficult conditions - there is a war, and every new day is perceived as a gift from above. When Peter appears in their lives, he becomes a reliable support for them: for little Lulu - a brother, for the beautiful Catherine - a protector, and for the thoughtful Maggie - a lover. But it seems that Peter is hiding something... And is everything so rosy in their relationship? Our days Emmy Hamilton, succumbing to her mother’s persuasion, buys a small bookstore on an island in the Atlantic Ocean. Soon she finds mysterious love letters and a drawing of a bottle tree among the books. This becomes the beginning of an exciting adventure, as a result of which Emmy will get closer to solving the mysterious events that happened on the island during the Second World War.