Everyone Transmigrated Into a Book, Why Am I Killed at the Start?

Good news: I transmigrated into a novel as the female lead, and a golden-born princess at that. Bad news: The moment I arrived, my childhood sweetheart stabbed me with a sword! Luckily, the protagonist's plot armor was strong as hell. Not only did Shen Siwei survive against all odds, she was also taken in by a tea merchant couple as their adopted daughter. After waking up, she analyzed the situation: her emperor father was already dead, her crown prince brother was missing and presumed dead, and her childhood sweetheart—the original male lead—had defected to the villain's side... Shen Siwei: Excuse me! What restoration of the kingdom, what schemes and grudges—nothing beats making money! ...