A collector of butterflies

The novel is built around the metaphor of the dried butterfly: our memories are like butterflies caught and pierced by a pin. Joel Haakhtela is trying to figure out the complex mechanism of human memory and extracting memories. Grasping the thread connecting the past with the present, a person can catch the essence of what is happening to him today.
The hero of the book, unexpectedly receiving an inheritance from a person completely unfamiliar to him, wants to find out how he is connected with the testator. By bit he begins to collect what is left of this person, he goes through his tracks, and it turns out that, becoming the owner of someone else"s house and other people"s things, he actually receives the key to his past