Not necessarily. Many stories that claim to be 'based on true events' still take creative liberties and might not be entirely factual. It could be inspired by real-life but with alterations for dramatic effect.
Save What's Left is a novel that follows the story of a group of characters trying to survive in a post-apocalyptic world, facing various challenges and uncovering hidden truths along the way.
The main theme could be abandonment. Since it's about those she left behind, it might focus on how the act of one person leaving affects others in terms of emotional distress, readjustment, and the sense of loss.
The novel follows a woman's disappearance and the efforts to uncover where she went. It involves elements of mystery, self-discovery, and perhaps a touch of romance.
The items Ye Qingmei left behind included a sniper rifle (in the TV series, it was changed to a crossbow), three letters (one was written to Wu Zhu, one mentioned the matter of borrowing a child, and the other was jokingly written), abortion medicine (left for her child), and keys (used to open the boxes she left behind).
What Ye Qingmei left behind were the Overwatch Council, the palace treasury, the Barrett sniper rifle, the map of the temple, Wu Zhu, and her own thoughts.
Ye Qingmei left behind the secret manuals of the four grandmasters, sniper rifles, soap, soap formulas, glass making methods, gun making methods, and banknote templates.
The climax usually involves a major turning point or the most intense and crucial moment. But for 'Left Behind', it depends on specific plot elements and character developments.