Human rights activists and Nobel Peace Prize nominee Nadia Murad is expected to meet with Prime Minister Malcolm Turnbull to urge him to recognise what has happened to the Yazidis as genocide.
It is a harrowing story that has captured the hearts of people around the world.
Just 21 years old, Nadia Murad is on a mission to push for the plight of the Yazidis and other persecuted minorities in Iraq and Syria to be heard.
Just two years ago, in August 2014, the I-S massacre of an estimated 5,000 Yazidi men at Mount Sinjar, Iraq, brought the Yazidis into the spotlight.
They are an ethno-religious group with an estimated population of 600,000, mainly living around the district of Sinjar in northern Iraq.
It was in the massacre that Nadia Murad's mother and six brothers were killed.
She herself was abducted from her village near Sinjar and forced to become a sex slave to a group that massacred her family.
"The worst part was when they came to our village and gathered everyone in a school. They took us in buses to Mosul and humiliated us along the way. We saw many difficult things that day."
Ms Murad was just one of thousands of women and children the I-S fighters took hostage.
She says among the children was an 11-year-old boy -- her nephew.
And while she managed to escape her hell three months later, Ms Murad has openly admitted he has been indoctrinated and trained as an I-S fighter and now calls her an infidel.
Her drive to seek justice for her community and condemn the crimes of I-S, or ISIS, has led her on a global mission to speak with presidents, prime ministers and other heads of state.
She is aiming to bring a genocide case to the International Criminal Court, or I-C-C.
Multiple global bodies have recognised the Sinjar massacre as genocide, but, to get the I-C-C to investigate, a member country must refer the case.
Ms Murad says she is appealing to Prime Minister Malcolm Turnbull for support.
"As I have asked other countries, I want Australia to recognise what happened to Yazidis as genocide and also make ISIS accountable for their crime against Yazidis, Christians and other minorities."
High-profile international human-rights lawyer Amal Clooney has taken on the case.
Ahmed Khudida is a Yazidi activist from the global Yazidi organisation called Yazda and is accompanying her in Australia.
He says he is shocked and frustrated at the lack of success so far.
"There are many conflicts in Syria and Iraq, and there is sectarian war there, and many countries also want to prosecute (Syrian president) Bashar al-Assad's army, or his government, with ISIS. They want to take all of them in one basket and open an investigation for all crimes."
He says he knows of about 20 Australian foreign fighters for I-S who have hurt Yazidis.
And he says he is prepared to give information about them to authorities.
"I think the Australian government should help us to get more information about them and bring them to justice and give Yazidis their rights, or justice. And, also, we think Australia can ask the International Criminal Court to open an investigation and prosecute not just ISIS foreign fighters in Australia but also in all Europe and the world."
Gideon Boas is an international-law expert in Melbourne.
He says it is difficult to say what the basis is for a particular massacre, conflict or act of persecution to trigger a referral to the International Criminal Court.
"It's a very difficult thing to get going, and it needs a critical mass. There are a vast number of conflicts and a vast number of acts of atrocity."
But he says he believes there are enough factors to warrant a case at the ICC.
"Longstanding persecution of the Yazidi people, the fact that the massacre which is being called a genocide by Islamic State on the Yazidi people certainly has enough interest. I think, technically and legally, it hits the right note. It's open to a finding of genocide, and Islamic State has nobody's support at the moment."
Gideon Boas says Australia should back the investigation and prosecution of all mass atrocities.
"This is an example of mass atrocity. I think remaining silent about it or refusing to support the proposition that people who commit these acts should be brought to justice is never a good thing. Australia has been, I think, relatively quiet on the international scene when it comes to matters of international criminal justice in recent years."
Australia promised last year to resettle an extra 12,000 Syrian refugees.
Nadia Murad is calling on the Australian government for a specific intake for her people from Iraq.
She says 90 per cent of her community is displaced and thousands have lost family members at the hands of I-S.
She says Australia is an appropriate place for Yazidis to resettle and she wants to see them placed on a priority list.
"I know the Australian people and government respect people's dignity and have values we can live under, such as women's and children's rights, which our country lacks."
Ms Murad says her past is spurring her on.
"What makes me continue and not keep silent is the sounds of thousands of girls or females that are facing crimes -- sexual, physical and psychological crimes -- the sounds of orphans or child refugees saying, 'We are hungry,' those refugees that are facing an unknown future -- they don't know whether they will be enslaved again."
