Victoria Montgomery married William Moon, a soldier, during the Second World War. She was two months pregnant when he left to fight off the invasion of Europe. She gave birth to Alfred Moon on 18 April 1944. William died on 12 June 1944, killed in action. She remained faithful to William and never had sexual relations with any other man, opting to raise their son alone. After Alfred and his wife Cherry were killed in a car crash, she moved in with her two orphaned grandsons, Alfie and Spencer Moon, who call her Nana.
Moving to Walford with her grandchildren in 2002, Nana's family became worried when she starts to become overly forgetful. It is suspected that she has Alzheimer's disease, but it turns out to be water on the brain, which is operated on with no lasting cognitive effects. Nana meets a pensioner, Wilfred Atkins, while on holiday at the seaside. They plan to marry, but on their wedding day Alfie exposes him as a fraud as he plans to flee with some of Victoria's possessions. She is devastated, and Wilfred leaves Walford having conned Pat Evans out of £30,000.
In 2005, Nana is diagnosed with an aortic aneurysm, and takes the decision to die, as her chances of surviving an operation were low due to her age (84). She works on a wish list of things she wants to do before her death, such as getting arrested, playing poker, to have tea with the Queen and to visit her dead husband's grave in Normandy. Alfie takes her to France to fulfill one of her wishes on Armistice Day 2005. Nana lays flowers on William's grave and tells him she will see him very soon. Alfie's emotional state is badly affected by Nana's deteriorating health.
As Christmas 2005 approached, the strain and stress on Alfie escalates. Still determined to do whatever his grandmother wishes, he tries to enjoy what he knew would be his final days with her. Per one of her wishes, Alfie buys Nana a battery-operated, dancing toy snowman and helps her decorate the Moon house for Christmas. As Nana and Alfie sit, watching the dancing snowman, the batteries run out. Alfie turns to his grandmother and is heartbroken to see that she has peacefully died on the sofa.