The discovery of grandfather's antique watch in an abandoned workshop takes brother and sister back to the distant past in the atmospheric quest Retrace. Finding themselves in Munich in the twenties of the last century, right at the epicenter of historical upheavals, the heroes accidentally disrupt the course of events and return to a dark, distorted reality with access modes. Carefully read useful hints in the diary, understand the structure of dozens of original mechanisms, correct the consequences of interference in two different eras, and restore the familiar world in Retrace.