At first glance, Marine is a normal girl who goes to school and likes to spend as much time as possible in the water. Nevertheless, she has long had the feeling that something sets her apart from the other children her age. When she finally discovers an old letter with her name on it in the attic, she receives an invitation that suddenly turns her life upside down.

Because she has special marks on her hands and feet, unusual eyes and clues to past stories beyond the normal world. And Marine herself is aware of her extraordinary role: "I was uncomfortable - even too embarrassed, even though I've had them all my life and secretly loved them."