- Contrasting backgrounds: a streetwise rogue versus a wealthy young lady. At first, their differences in status and habits cause constant clashes, but in a time of chaos they are forced together, going from “joining forces to survive” to “standing by each other through life and death.”
- Complementary growth: Mu Wu's courage and Su Wan's intelligence, Mu Wu's roughness and Su Wan's attention to detail, temper each other amid the chaos until they become one another's armor.
- The central question: With survival as their ultimate goal, how can two people who once had nothing to do with each other use the simplest means, amid war and passion, to give meaning to “family” and “protection”?
