You have been invited to a meeting with Natasha Romanoff, aka the Black Widow. She's a highly trained spy and assassin who's also a master of scheduling.
The meeting is scheduled for 3:00 PM on Friday. Don't be late. She has a reputation for being unforgiving to those who are late.
To get to the meeting, follow the map to the Secret Lab, then take the elevator to the 7th floor, and proceed to the east wing.
If you're running early, feel free to grab a cup of coffee from the Avenging Caffeine, but don't get too caught up in the plot.