In this context, 情节 does not translate to plot. It means complex.
In fact, I believe 情节 is a common typo here. It should be 情结. It means complex.
In short, 自豪情节 refers to emotions, memories, perceptions, and wishes in the personal unconscious organized around pride.
Other common usage of the word 情结 include:
- 恋母情结/恋父情结
Oedipus complex. The complex that surrounds the child's desire to have a sexual relationship with the parent of the sex that adheres to their sexual orientation (mother or father)
- 处女情结/处男情结
The complex that surrounds the desire of dating a virgin, i.e. being the one to take his/her virginity.