Rain Butterfly

After my mother's funeral, I returned to my old home in Jiangnan. As an architect, I instinctively sensed that something "wasn't right" about the structure of this house. A "Book of Songs" contains a specimen of strange and beautiful butterfly wings code-named "Rain Butterfly"; Behind an old brick wall, a pistol that was maintained like new and several fake passports were found. The gentle and kind mother in my memory changed beyond recognition overnight. When my father accidentally fell off a cliff, on the back of the photo of the scene, my mother's cold handwriting was written: "Cleaned up." What I once thought was home turned out to be a carefully disguised prison. Now, the cage door is open. Should I turn around and flee, or go into the depths of this rainy night and uncover her bloody secrets hidden in time?