Y/N and Cade are two American teenagers who unknowingly sign consent for a neurological experiment that strips their language and replaces it with a new one every week. Each wipe takes everything — the words, the people, the version of themselves that existed that week. The scientists who run it speak only English. The language they took and kept for themselves. Cade picks the same language as Y/N every single week without ever saying why. When the scientists notice their relationship they separate their languages deliberately — not as punishment, as data. The feeling survives. The ability to reach each other doesn’t. At the end of the experiment there is one final choice. One language to keep forever. English is not on the list. And neither of them knows yet if they will choose the same one.