Ten years ago, passages to alien worlds opened in the city of Kharaminsk. Strange creatures poured out of the colored craters, and several thousand inhabitants disappeared into the other world. Some managed to return, but changed. Dinka is changed, and her unique ability is of interest to those who study the other world in different ways. What awaits Dinka at the Soter Research Center and at the Worldfinders agency? What secrets do alien worlds hide? And will worldseekers be able to cope with the dangers on the other side of the portals?