Earlier quoted context omitted.
What do you mean he can't copy the plot? Any commercially successful movie is using one of about five basic plots.
Could you explain the five basic plots? While the number of plot structures are fairly countable, a plot can still be considered different by changing part of its contents (character, setting, etc.). The decision on whether a plot outright infringes on an existing plot varies case-by-case. An example of outright copying is "Fistful of Dollars" directed by Sergio Leone, which lifts the plot from "Yojinbo" by Akira Kur…
2. Romeo and Juliet
3. Robin Hood
4. Crime and Punishment
5. maybe there are only four.