The freedman Milichus betrays Piso's plot to kill the Emperor Nero and all of the conspirators are arrested.

AD 65 (LXV) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Nerva and Vestinus. The denomination AD 65 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

A freedman or freedwoman is a person who has been released from slavery, usually by legal means. Historically, slaves were freed by manumission, emancipation, or self-purchase. A fugitive slave is a person who escaped enslavement by fleeing.

Flavius Scaevinus, a praetorian tribune and quaestor, was a member of the Pisonian conspiracy against Nero. It was through his freedman Milichus that Nero discovered the conspiracy. Afterwards, history is silent on the fate of Flavius, with some sources saying he was a consul under Otho, then exiled by Vitellius. Tacitus merely states that he "perished" after the conspiracy was exposed. This has been taken to mean he was executed.

The conspiracy of Gaius Calpurnius Piso in 65 CE was a major turning point in the reign of the Roman emperor Nero. The plot reflected the growing discontent among the ruling class of the Roman state with Nero's increasingly despotic leadership, and as a result is a significant event on the road toward his eventual suicide and the chaos of the Year of the Four Emperors which followed.

The Roman emperor was the ruler and monarchical head of state of the Roman Empire, starting with the granting of the title augustus to Octavian in 27 BC. The term emperor is a modern convention, and did not exist as such during the Empire. When a given Roman is described as becoming emperor in English, it generally reflects his accession as augustus, and later as basileus. Another title used was imperator, originally a military honorific, and caesar, originally a cognomen. Early emperors also used the title princeps alongside other Republican titles, notably consul and pontifex maximus.