Lina and Faridah share a fate that brought them together.

Something they can not talk about with others.

Their sons Aayan and Ishmael joined IS.

"We did not understand the seriousness"

Lina has long ruffled hair.

On the wall hang framed pictures of three children, between five and eight years old.

One of the pictures represents Ayaan.

Lina can not understand how the smiling schoolboy could become one of the 300 Swedes who joined the world's cruelest terrorist sect.

- He was kind, caring, studied at the university.

But suddenly he stopped going to the lectures.

The school is haram, he said.

- Fucking haram.

Where did he get it from?

We are not religious.

I do not fast, do not pray.

We have never talked about religion or politics at home.

We did not understand the seriousness, says Faridha.

At first she thought it was a good thing that her son was getting interested in religion - better than that he is out running anyway.

- But I could never imagine what would happen.

Traveled to Syria with smugglers

Despite the shock of the sons' choice, the two mothers were prepared to risk their lives to bring them home.

They traveled to the border town of Gaziantep and then moved on with the help of smugglers.

- The first smuggler spat at me and refused to drive us.

He said we were unfaithful because I did not cover my hair.

The next smuggler was driving a minibus.

But they were soon discovered by the Turkish military.

- I was so scared.

I thought, now they are shooting us, says Farida.

There were high ramparts along the border and the women ran up them to sneak into Syria on the other side.

The luggage remained in the minibus.

Late at night they arrived at Albab where the sons met.

For five days they talked, cried, barked and hugged.

But in the end it was time to go home.

Empty hand.

One month after returning home, Farida receives the death notice.

Imprisoned in Syria

Lina's son was later arrested by the Kurds and is now in prison in northeastern Syria.

Sweden has been clear that they do not want to take home the IS Swedes.

- I think about him all the time.

How is he?

How long will he sit there?

How could they leave the door to IS open for them, but close the door to home now?

Let him come home, says Lina.

But should he go free then?

- No, he will be responsible for what he has done here. What happens to murderers and pedophiles? Yes, they are brought to justice and sentenced. Do the same with him. But do not let him rot away there.