The first encounter of Entity 303 was a private email sent to TheSpeed179, who would later document his own sighting of the creature. In the email, the user named Frankie told Speed about how he was playing a regular Minecraft game on a private server with his friends, John, Vincent, and Brady. The four had built a survival city located in a desert biome when John noticed something strange in the chat. The server was only using two plugins, "Essentials" and "SocialSpy", the latter plugin was able to detect an unknown user by the name of "player.number:303" using the "/stop" command. The incident would induce major anxiety in John, who believed that the unknown player was a hacker trying to shut down the server, which was whitelisted, meaning that no one else could join except for them.

Around 20 minutes later, Frankie and Vincent spotted a white-skinned, red-eyed figure in the distance, while Frankie went after it and Vincent's player remained still, not talking in the Skype chat. The figure disappeared and Vincent disconnected from both the server and the Skype chat, not responding to any of Frankie's repeated calls and text messages. Frankie's screen started to glitch, spamming “Object successfully summoned” by “player.number:303.” in the chat repeatedly. Suddenly an unnamed user joined the Skype chat and said nothing, Brady disconnected and John began to panic even more than he had done previously. The anonymous Skype caller finally put his facecam on, John left as the caller, who was buried in the darkness of the screen muttered "Make a wish". Frankie's Minecraft chat then began spamming “FILE OVERLOAD” in red text, along with “MAKE A WISH” in gray text. Frankie was then suddenly poisoned and was unable to move his character, exit the game, or turn off his computer. A player in a white parka with completely black skin and red eyes then rushed up to Frankie, typing in the chat “Make a wish, and say goodbye to your friends", before killing Frankie and shutting down his computer.

Frankie chose to instead log on to his laptop to try and reach his friends, but to no avail. The next day at school Brady finally shows up again and informs Frankie that John and Vincent had gone missing, Frankie ditched school and ran to John's house only to be informed by John's mother that John had snuck out at night and committed suicide, leaving only a note detailing his fear for whatever was targeting him. On the back of the note read "MAKE A WISH".

Frankie went to visit Vincent's house and found that no one was home, he managed to sneak in and found "MAKE A WISH" written in red marker on the walls of Vincent's bathroom. He finishes his tale by telling Speed to watch out for Entity 303 at all costs and promising to email him again if he discovers more information.