In 2012, a new charity bursts onto the scene.

It's called Believe in Magic, and it grants wishes to seriously ill children.

It's run by an inspirational 16 year old girl called Megan Barrie.

I just wanted to give them the magical experiences back.

It has the support of the biggest boy band in the world. One direction.

Believe in magic quickly becomes a household name in the child cancer community,

putting on parties, sending thoughtful gifts, even organizing trips to Disney.

Every single child there felt like they were so important and they weren't poorly, they weren't in a hospital. It was out of this world.

Megan is adored by all those she helps. She had more sympathy and love for people

than I'd ever met anybody before.

Because she herself is extremely unwell with a life-threatening brain tumor.

Her handbag was so heavy, none of us could ever carry it and it was full of medicine.

When something doesn't add up about Megan's story,

a small group of parents start to question whether Meg is really ill.

I'd call it a witch hunt kind of thing, asking questions like, which hospital are you in?

They know that they're not being honest

about her illnesses.

We collectively said, we won't let it drop,

we'll find out this time.

But is Megan actually facing a very different danger?

So soreful.

It's really not nice listening to that, was it?

...