Zoe and Sammy delve into a disturbing tunnel. Meanwhile, Charlotte and Louna discover a suspicious shelter in the forest, which reignites doubts about Louna's past. Meanwhile, Charlotte questions her feelings for Billi.

Florence hasn't returned to camp, and anxiety is mounting. The group launches a frantic search through the forest, well aware that with her condition, they don't have much time. Every minute counts to find her.