A song dedicated to the inmates of the infamous Evin prison in Tehran, where he himself is now imprisoned after showing support for the protests.

Just over a month ago, Toomaj Salehi was arrested.

According to information provided to Iranian opposition media, his home was stormed in the middle of the night and he was taken away along with two friends.

Much more than that, not even Salehi's family knows.

- Since he was arrested, no one in our family has been allowed to visit or contact him, so he himself has not been able to tell us what his situation looks like, says his uncle Eghbal Eghbali, who lives in Germany.

However, the family is sure that he has been tortured.

Baseless accusations

Four weeks after the arrest came the first official information about Salehi: an indictment accusing him of "spreading corruption in the world" - a crime punishable by death in Iran.

State-controlled media accuse him of playing a central role in the protests that have rocked the country for more than two months.

Baseless and false accusations, according to the uncle.

- What Toomaj does has always been public, he has not engaged in any underground or secret activities.

He is a socially critical rapper, he wanted to be the voice of the people through his music, says Eghbal Eghbali.

Fans worldwide

Because of Toomaj Salehi's artistry, the arrest and prosecution have received worldwide attention, but his situation is far from unique.

Tens of thousands of Iranians have been arrested during the protests and many of them face the death penalty.

At the time of writing, Iranian authorities have sentenced at least 21 people to death in mock trials, according to Amnesty International.

Many more are feared to meet the same fate.

At the same time, hundreds - at least 448 people according to the organization Iran Human Rights - have been killed in the streets.

Toomaj Salehi has fans far beyond Iran's borders thanks to the Iranian diaspora.

The special thing about him is not his opinions - his view of society is shared by most young Iranians - but that he actually dares to express them even though he still lives in the country, says Afagh Levin, a fan who lives in Sweden and has been very involved in his case.

- Lately I haven't been able to listen to anything other than his songs, she says.