December 1991, Sandringham Estate, Norfolk. With Christmas Eve just around the corner, Diana Frances Spencer, The Honourable Princess Diana of Wales, finds herself struggling to reclaim her lost self, against the backdrop of the strained relationship with her husband Prince Charles and his extramarital affair with Camilla Parker-Bowles. Having spent years trying to live up to expectations, Princess Diana reunites with her sons, Prince William and Prince Harry, and attempts to keep her chin up, bracing herself up for the imminent holiday festivities in one of the royal residences of Her Majesty The Queen Elizabeth II. However, as dreadful rumours of infidelity and divorce take a heavy toll on her marriage and increasingly fragile mental health, vivid visions start to haunt Princess Diana--unfavourable and prophetic omens of the inevitable.