You are a junior member of a gentlemanly crime-fighting unit. To your great shame you have allowed a villain, named Nemi Siss, to escape. You’ve searched for him in broad daylight and narrow darkness, but to no avail. Now nursing your sorrows, over some medicinal alcohol, you reach for your pocket change and find a discrete card. Your mentor has summoned you, for a spot of retraining. You enter an unfamiliar study. The low fire and pipe smoke speak of hours spent in deepest thought. The furniture sits in dumb silence. Perusing the mantelpiece you spy a curt missive addressed to yourself
Copy the zipped map file *as is* into your Saves folder. The next time you run Minecraft, the map will appear under your Saved Games.