The reason why the plot of the celebration was unreasonable could be as follows: 1. Abrupt plot twist: Some plot twists are too abrupt, lacking foundation and logic, making it difficult for readers to understand. 2. Unreasonable characters: Some characters have inconsistent personalities or show unreasonable behavior in certain plots, which confuses the reader. 3. [Plot development is illogical: Some plot developments are illogical or too bizarre for the reader to accept.] 4. Poor handling of details: Some details are not handled in detail enough, or there are loopholes that make the reader dissatisfied. The above are some of the reasons that may cause the plot to be unreasonable. The specific situation may vary according to personal feelings and understanding.