One Day Before the Big Shot Dies

Candy wakes up to find herself a side character in a period drama, forced to marry war hero Zayn, who has a leg injury, in place of her stepsister. She then helps Zayn cut the toxic family ties and does everything possible to treat Zayn's leg. Once Zayn's leg recovers, they work hard together and their lives get better and better. Those who once looked down on them are now regretting it deeply.