She gave the princess shrimp noodles, which caused the princess to die of allergy.

So on the return flight, the ghost of the princess kept pestering the stewardess and finally scared the stewardess to death.

But there is one small detail about the stewardess &; The princess is a rival in love, and the stewardess's lover is the princess's husband, so the princess will make things difficult for the stewardess at the beginning of getting off the plane, but she did not expect to eventually lead to her own death.