This route follows the arete to the right of Danger Boy and joins that route at mid-height.
The opening moves are tricky and sequential--sometimes they feel absolutely dumbfounding. Once you're off the ground, straightforward and interesting moves lead up the arete to a large ledge. Once on the ledge, the route moves left and continues on the exposed upper headwall of Danger Boy.
For full value, avoid stemming wide to the concrete wall.