Michael Collins is a dramatic film starring Liam Neeson. The film tells the story of Michael Collins, an Irish revolutionary leader who died during Ireland's civil war. The film opens with Collins and a few of his fellow fighters being captured by the British Army. Collins is sent to an internment camp and he vows that he will never be captured or surrender again.
Collins gets out of the camp and decides to run for a seat in Ireland's legislature. Many people do not like what he is saying and he ends up being attacked and severely beaten by the mob. Collins becomes increasingly hostile to British rule and he ends up becoming the leader of the Irish Republican Army, a group that many people consider to be a terrorist group. The IRA begins to attack police stations. The IRA influences England and Collins is soon asked to go to London to negotiate a treaty between Ireland and Great Britain.
The Irish legislature approves the treaty but Collin's friend, de Valera, is upset about it. De Valera is also a well-known revolutionary and after the treaty is approved, he and Collins take to the streets to try and get people to agree with them.
Collins is continuously attacked for his views but he doesn't let that stop him. He even finds time for romance with a young woman named Kitty and during this period he asks her to marry him. In the meantime, de Valera is still furious about the treaty that Collins has signed and he orders the IRA to ignore it and continue fighting.
Collins decides to try and make peace with de Valera and get him to stop the attacks. The two men agree to meet on Collins's wedding day. On his way to the meeting, Collins is ambushed by the IRA and killed. The film ends with footage of his funeral.