The story reveals it'self as the paper unfolds. With a little trial and error, I found out how to prepare the paper so it would fold properly. The diagram below shows how a spiraling 1/4 inch margin (about 1 cm) needs to be cut from a piece of paper. I used 18 x 24 inch paper as it was easy to divide in thirds.
A finished cut example is below. The ones I gave students did not have a dotted line. That was just for this example.