Hazel couldn't stay at home anymore. This latest argument with her parents was the last straw. After leaving, an old friend messages her to offer a place to stay. Hazel accepts, and moves in with two former friends. They start rebuilding their friendship.
On Boxing Day, Hazel and her friends - Silena and Avery - take some acid. As the drug wears off, they start to notice they are back in Silena's childhood bedroom, and strangely all three look younger.