At six o'clock on Saturday morning, Lola and Rae walk down to the pier . Standing on the damp wooden boards, Lola spots a rectangular metal corner in the mud and pulls out a heavily weighted, rusted tin box sealed with crumbling 1970s electrical tape . They return to open it with Tommie and Bea. Inside, they discover a fifty-year-old time capsule: a wooden whistle, dried lavender, eleven black-and-white photos from August 1972 showing teenagers at the Üllői Forest School, and a hand-drawn map of Ivybridge Academy by architect Tóth Pál from 1879, with an 'X' marking Room 17 (the Observatory Antechamber) sealed since 1893 .
Turning over the lead photograph, Lola finds a young eighteen-year-old 'Margaret'—her grandmother. A note from 'M' reads: 'We are putting this in the lake because what we did this summer is going to follow us back to Budapest. Some of us are not going to be allowed to see each other again.' . Back at the hotel, Mr. Bartlett approaches their table and whispers that he saw them from his window . In a private talk on the pier, he tells her not to mention it to her grandmother yet and to visit the old camp instructor, Mrs. Tamás .
While Bea provides air cover by calmly lying to the teachers, Lola, Tommie, and Rae sneak across vineyards to Mrs. Tamás's house . The ancient woman tells them her grandmother loved a quiet boy named Tomi who died in a train accident, causing her grandmother to bury her broken heart . Returning to the hotel, the mystery collides with reality: Bea reveals her father's corporate lawyer, Mr. Kasztner, is there to spy . In a definitive act of rebellion, Bea hides the photos in her own personal luggage because the lawyer will never dare search it . The group chat formally expands to four.