Watch emotional trailer for upcoming documentary

The  new trailer of Warner Bros. upcoming documentary 'Batkid Begins' offers an emotional glimpse into Scott Miles' story.

Miles was a five-year-old leukemia patient in November 2013, who had his wish of being a superhero for a day fulfilled through the Make-A-Wish Foundation.

The upcoming documentary follows his battle with cancer to his becoming an online sensation.

IMBD Plot.

On one day, in one city, the world comes together to grant one 5 year old cancer patient his wish. Batkid Begins looks at the 'why' of this flash phenomenon.

The film will be in select theaters starting June 26.