Then cancel your 3rd, pull all your drones and GO.
Watch the Protoss vomit in disgust at how stupid you are :D. Enjoy the ladder points!
Don't build any more drones after the 3rd hatch and save larva - but if they're checking your main hatchery you might want to build extra drones to make it look like you're playing normal (saving up 3 larva as pools finishing looks suspicious)
Build 1-2 extra overlords to clear supply
Make sure you keep following the probe with 2-4 lings to hunt it down
Use overlord above Protoss natural to see which way adept goes out of the base - Run in with all your lings and drones just as it shades away. If it stays at home and finishes wall very fast then try to drill through and attack with drones from behind and lings from in-front