The students were on their field trip.
Some students played a prank on their classmate and locked her in a fireplace at a concentration camp memorial museum. A teacher found her and took her out, but was misunderstood that he wanted to rape the student.
Their school bus stopped at a rest station. A male student didn't return to the school bus and asked his classmate to respond to the roll call for him. He met a couple in the wild and got in their car, chatting with them happily. But suddenly he was shot to death.