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.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.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.