Drive to the cemetery and time will automatically pass. You can also complete the side mission She Rode With Us first before entering the cemetery gates to get easy free exp. From the gate, go down the path and turn left. There should be a broken part of the fence where there’s a deer corpse and a Freaker. Take out the freaker then vault over to enter this fenced area.
Follow the pathway and you should immediately see the distinctive angel statue. Use your Survival vision to find and examine the crowbar in front of the statue, at the bottom of the stairs.
Approach the marked stone casket and slide it open to retrieve the Stash. As soon as you do it, a NERO helicopter will come buzzing overhead. The Noise will attract freakers so expect some of them on your way out. Don’t forget to examine the angel statue as well since it’s a historical marker. (Margaret Alice Miller - The Guardian Angel)
You can only carry the Stash on both hands so if you need to fight freakers, you have to drop it temporarily and pick it up again after Combat. kill a few freakers along the way as you make your way back to your Bike. Interact with your bike afterward to secure the stash. Next, ride your bike and follow the mission Markers towards where the NERO Helicopter is hovering. The next mission will start automatically.