In "American Pie 4", old friends will be reunited because of the high school reunion. During this rare weekend holiday, they will find each other's changed and unchanging character, and prove that distance will not break their friendship. In the summer of 1999, four high school students, Jim, Kevin, Finch and Oz, made an appointment to say goodbye to their virginity on the night of the prom. After all these years, Jim and Michelle got married, Kevin and Vicky broke up, and Finch is still full of longing for Stifler's mother. Now a few old friends get together, and * * * hopes that he knows that they are good at the ping funny times full of hormone odor beads.