In this episode, Marco finally gets to hear the gruesome story of Luna's kidnapping by "The Mysterious Six" when she was just a six-year old child. Apparently, she was put in a cage together with... four other girls of different ages, all of whom had to participate in certain "activities" in order to survive - ranging from simple physical tests of strength to performing unnaturally brutal acts of violence... and even despite that, the girls somehow managed to bond with each other, make friends and even have fun under the harsh circumstances. With particular fondness, Luna remembers the lovely little Sofia and her amazing fantasy towns that she constructed in her head - perhaps her happiest recollections of that harsh time in her life...