In this world, everyone receives their soulmate mark on their 18th birthday — a unique symbol that appears somewhere on the body, said to match that of the one person you’re destined to be with. The mark is never random. It might be a word, a phrase in a long-forgotten language, a strange shape, or even a feeling only you understand. Some people spend years searching for the person who carries the same mark. Others find them instantly. And a few… never do.