Franco de la Piedra* is one of the smaller but very successful and important Bauhaus noble families. Vittoria and Carlos - the current leading members of this ancient business conglomerate in the cosmetics industry are once again inviting the other nobles and their plus ones to the event of the year - the celebration of El Dia de los Muertos. This time in the Unknown in the First Homebuilders Reserve District, which is actually a preserved mausoleum of old Heimburg.
The whole house is turned into a puzzle to search for clues which should point you towards the next indices and further on and on until you find the secret treasure - which turns out to be a starter for a massive spectacular Samhain inspired visual and acoustic show. Little do the now mostly drunk and well-fed people at the party realize that the yellow gas which is part of the show and slowly fills the whole house, is a sleeping gas. Leading to the whole party falling into gentle but dark slumber.
* There is a small riddle hidden in the name itself. ;)