Although it is primarily through Tacitus’ narration of the event that we are able to reconstruct the Pisonian conspiracy, the particular details of the plot can be partially completed from other sources of information. In that regard, relatively little time has been devoted to Plutarch’s account — found in his essay De garrulitate — of the discovery of the Pisonian plot. The account to some extent poses a problem, as it does not explicitly specify which conspiracy it refers to. In addition, the account is in the form of a moral essay; most importantly, it proffers a version of the events of AD 65 (when the plot was disclosed) that is totally different from that of Tacitus. Therefore, the purpose of this paper is at least partially to incorporate Plutarch’s report into the whole, rather foggy portrayal of the Pisonian conspiracy, and simultaneously to point to the fact that Plutarch’s report may not be an alternative to Tacitus’ one, but rather a complement of it. The author strives to evaluate the various literary and historical elements of the report, as well as its possible sources, and following the knowledge obtained, to assess its informative value within the broader context of the entire conspiracy.