In Jerusalem, the glorious past city does not overshadow its present and rich future - a secret laboratory for the study of time disorders. There is nothing more appropriate than Jerusalem in all its shades and levels to be the basis for such research activity.
The laboratory is run by Prof. Havatzelet Hasson-Sharon, a colorful, slightly scattered figure (as befits a professor in her position), who spends nights trying to launch Arieh - her faithful dog for the future…
As is the nature of experiments in the field where the hidden prevails over the visible, it happens that they go wrong and then time windows open around the city, some invite guests from the past and some create disruptions in the proper conduct of the city.
The lab staff asks you players to help the professor and be the lab representatives in the field. For this purpose, you will be required to download an app, which will allow the lab to communicate with you and guide you along the way.