The year is 2089. Virtual Reality technology has become a hit. Nearly every household has a traditional headset along with gloves and a treadmill. This is primarily due to MULTI. MULTI is a VRMMO that contains everything. A universe within a universe. Due to the advanced servers and internet, everyone plays on the same server. There are no loading times. MULTI covers everything. There are planets dedicated to medieval skyrim-esque adventures, planets covered with sprawling, cyberpunk cities. Epic space battles or warring pirates. There is no limit to what you can do. Planets are created monthly due to an advanced AI and MULTI INC.'s thousand-man team. Procedurally generated planets are always explorable. Players can build, create their own factions, and take down others. 

It was all fun and games, until the incident.

MULTI INC. sent out thousands of emails, inviting thousands of players to one of their test facilities around the globe. The players were, of course, ecstatic, but they had to sign an extremely strict NDA. After entering one of their remote facilities, they reveal to them a new technology. MTech. Multi-Virtual Technologyl The MTech is a device that looks a bit like a CAT scan. When someone enters the MTech POD, the machine scans their biometrics and administers a painless surgery. From there, the machine used their brain as the VR Experience. It can simulate their five senses perfectly. When using MTech, processing power is unlimited. Everything is absolutely photorealistic. From each hair follicle to each leaf. TThe pods and the buildings are locked. No one gets out. Everyone from the outside world is locked out of using normal VR headsets to play the game.

tl;dr: people get stuck in a vr scifi game and are forced to survive and eventually find a way out, the rp takes place (5) in-game years after the incident.

anyways, would anyone do it? it would probably start off as researchers finding a signal from the depths of MULTI, revealing new hand-made planets being created from within the game. our protagonists would then create a team to explore MULTI, get lost in side quests, and find out how to escape.

(also, due to MTech, MULTI INC. is able to replicate neurons. the NPCS in the game are as alive as you and me.)