The novel starts with a seemingly terrifying scene. The son is knocked out by the robber who broke into the door. The mother had an incest relationship with the awakened son under the force of the robber. After the robber left, the son started a happy incest physical relationship with his mother. However, this is not over yet. Through the son's own statement, we know that this was a plan designed by the son. The son has always thought he was proud of himself. Unexpectedly, after developing a sexual relationship with his accomplice and his sister, he learned that it was a plan that was a series of plans, that is, the origin of all this. It turned out that the mother took the initiative to seek incest and set up a plan...