At dawn on 25 April 1915, four mates land with the ANZAC troops at Gallipoli and find themselves in a chaotic and heroic battle for the Turkish heights. By the end of the disastrous first day, the senior British officers make a drastic decision.

After a month of heavy fighting, the Anzac and Turkish soldiers meet in No Man's Land during a cease fire to bury their dead. Tolly risks his life by charging a machine gun nest to protect his brother. The newly arrived light horsemen are shocked by the aftermath.

Tolly is promoted ahead of his older brother, but disaster strikes when their platoon launches a surprise midnight attack. Journalist Ashmead-Bartlett visits Lord Kitchener in London with dire reports on the Anzac campaign.

Tolly recovers from his injuries in Cairo, and reluctantly returns to the front line at Gallipoli. After one of his close mates is killed, Tolly volunteers for sniper duty alongside the legendary Chinese-Australian sniper Billy Singh.

In August 1915, General Hamilton devises a massive attack across the Gallipoli Peninsula to break the stalemate. Tolly and his mates defy the odds to win the battle of Lone Pine, while the Light Horseman are decimated at The Nek.

Australian journalist Keith Murdoch visits the British PM with a secret letter that will change the course of the war. Tolly is commended for his bravery at Lone Pine, while Dave refuses to get help for chronic illness.