Why do you think Uma looks puzzled? What advice would you give to Marcus and Sophia? Marcus and Sophia are chemists conducting experiments for Wuxi Pharmaceuticals on how bacteria ward off viral invaders. They just left the lab to attend a retirement reception for the head of maintenance, a highly respected and well-liked man responsible for keeping the lab facilities running during power outages and holidays. Nearly everyone has come to wish him well.

Marcus and Sophia are carrying on a lively conversation, excited about something that happened in the lab that day. They enter the reception area and settle into a corner with Uma, the public relations officer, and Drew, the new webmaster, who is looking uncomfortable in such a large group.