What is the movie Butterfly Effect about?

This is an analysis of the plot. . . I don't understand. . But at least you won't be confused if you understand the plot ~ ~ coax ~ ~)

After watching the story, it will be clear as soon as you contact the movie name. That is to say, he keeps going back (this is also a magical thing he found when he read his previous diary ~ so this movie can be said to have really entered the "butterfly effect" in this place), constantly changing the historical amnesia point (which can be understood as the turning point of the butterfly effect). . . But the butterfly effect led to the unexpected ending of these changes (that is, people say that this film has n endings). Therefore, after the memory is over, his memory is changing and constantly being renovated (which is why he will twitch and flash some pictures after the historical changes). But after he returned to the present, he was still dissatisfied with the reality. So as to go back to the past and change, but the ending is still the same. . . Alas. In the end, he can only stop all this by committing suicide (confirming what the mage said, you have no lifeline). . . He Shi died and nothing happened (you shouldn't have come into this world when you were recruited by the mage). Everyone is alive, happily married and having children (this is the real ending ~ ~ ~).

That's probably what the content means. If you don't understand, please watch the movie again, watch this answer again, and then you will understand this hero (I used him). . . Remember my first sentence: think with the film content and the film name! ! !