In Once Upon a Time, this takes place a few months after Henry left, or whatever the equivalent of that would be in Storybrooke. In Descendants it takes place 6 months after the events of Descendants 2. Also make sure to check out the links on my profile!
Henry was riding on his motorcycle after a flying shadow. He had to get that bean back before she used it. Ravens cawed through the forest. The trees were so thick with leaves that barely any moonlight shined through. Snaps and crackles under his motor cycle and the soft roar coming from it alerted anyone that he was coming, which was not exactly what he wanted. All of a sudden, there was a burst of light, and a circle of flames opened. The shadow went through, and Henry followed it, just before the portal closed.
When Henry came out of the portal, he squinted in the sunlight. In front of where his motorcycle was parked was a huge castle, with yellow and blue banners on either side of it. A small hedge maze swirled around the front of it. In the center of it, was a statue of a man who looked regal. A king, it fact. However, the place looked deserted. Fearing that she had already attacked, he looked around for any sign of life.