This is a BBC podcast. You can get all our podcasts and our terms of use at BBCWorld

service.com slash podcasts.

Welcome to assignment on the BBC World Service. I'm Neil Rizel.

It's hard to believe but tens of thousands of people go missing in Europe every year.

Some for days, some for months, some for years. Some vanish entirely.

This is the story of one of them. In your siney ses,

ode-estaggo,

a minute taurine,

he ab-

Myder Legaretta stands in an empty school on top of a mountain in northern Spain.

She studied here and so did the boy she's singing about.

The boy's father is Pablo Eluth.

He was born in the bathroom of a house.

When he was small, every afternoon we take special time to play,

just him and me, for about half an hour.

And he'd be the boss. He was always a kid who loved football and he loved

music. Sometimes he'd sing when he thought we weren't listening. He knew a lot of songs by heart.

Pablo's son's name is Ode.

He was born in 1989.

He was happy here, with the teachers, with all his friends,

and later on girlfriends too, everything.

The stuff of dreams for any parent. The nightmare begins in 2013.

...