A plot summary of "The Hot Zone" is currently not available on SparkNotes.com as of July 2015. However, it is available on other literature websites, such as eNotes.com and BookRags.com.
Each of these sites offers a detailed plot summary of "The Hot Zone", but one may be more in-depth than the other. For example, BookRags.com provides chapter synopses and character and theme interpretations of the book.
However, eNotes focuses more on the plot summary as a critical survey of contemporary fiction, and it offers a critical compilation of the key events in the book. This site also lays out steps for further study of the book in more detailed aspects by providing a list of study sources.