When a couple, Geoff and Kate, prepares to celebrate their 45th wedding anniversary, their seemingly perfect life begins to unravel with the arrival of unexpected news. Kate, who has always been the loving and understanding partner, discovers that the body of Geoff's former girlfriend, who tragically died years ago in the Swiss Alps, has been found intact in the ice. This discovery triggers a whirlwind of emotions and the resurfacing of old memories that Geoff thought he had left behind.