For starters: this would need ramming to be possible, so as of writing this post, this event probably isn't feasible without some major admeme sleight of hand tricks or such. This event is also round-defining in scale, as it poses the risk of total station destruction.
Basically, it starts with a central command report of a large mass approaching the station. The VGroid has many shuttle thrusters attached to it, and someone is flying it directly towards the station with the intent of crashing into it. It is up to sec (and maybe more crew idk) to dungeon crawl through the VGroid and get to the pilot and stop them before it is too late.
Some other ideas relating to this event idea cooked up by some friends and I:
Intercoms in the pilot area for monologuing as sec progresses through the VGroid
Henchmen with mosins for sec to fight through
A docking area for crew to land on for a big starting fight with said henchmen
