William, 18, is a shy young man trying to forge an identity and find his place in the world around him. It's the beginning of summer, and he's been invited to Plume's house for a small end-of-year party. This evening was supposed to mark the end of a period they spent together before the start of their student life, but the events that are about to unfold are likely to surprise the group of friends and give this joyful moment a completely different twist.