What is the plot of game plan by thomas j dygard?

It seems you're asking about the plot of a book called "Game Plan" by Thomas J. Dygard. However, there doesn't seem to be a book by that title written by Thomas J. Dygard.

Do you perhaps mean a different title?

If you can provide more information, like:

* The book's genre (sports, mystery, etc.)

* The main characters or setting

* Any other details you remember

I can help you find the correct book and give you a summary of its plot.