When you choose this mission, you hear a mysterious voice who tells you to go to a rift. Once you get to it, walk into the rift to be transported to another area. This is another of those activities in the game, with this one requiring you to jump from platform to platform, in order to get points.
The catch is that the closer you land to the center of the platform, the more points you get. Think of the platform like a target and the center is a bullseye, which is how you get the maximum amount of points. The only different ones are the ones with arrows (seems to count as bullseyes no matter what as you sprint through them) and those without a lot of targets. The mission will be over when you run out of time or finish the activity.