Finding "that—don’t-know-what" is a saying; the fairy tale begins at the moment when they try to make sense of the assignment for a strange device.
For Severina, a talented mechanic from the Thirty-Third Realm, the king’s simple errand turned into an unexpected journey filled with adventures. She has to find her happiness and tackle a non-trivial task: to figure out what Kościej’s death is like—and what, after all, the egg has to do with it?