Batkid Begins, a documentary, follows 5-year-old Miles Scott as he and his family work with the San Francisco Make-A-Wish foundation to realize his wish of being the real Batman. The agency teamed up with the city of San Francisco to give Miles a day of fighting crime and saving the city as Batkid, alongside his grown-up partner Batman.

The trailer captures an entire city rallying around the wishes of one sick kid, with two billion people on the internet coming along for the adventure in real time.