Delilah's gone quiet since her last confrontation with the team. They know she's even more determined to build her body count to drive home facts about some environmental issue. Yet there have been no attacks or messages. Even with her silence, Colin, Betsy, Frank and Stephanie along with the whole team work to gather more evidence and dig up more information about Delilah. The Silent Death terrorist group releases notifications and talks about different environmental issues but no clues as to Delilah's current activity. Even more people are in peril as they follow lead after lead. No one has a firm idea on what she's up to. Meanwhile Betsy, Myra, and Leisl continue to work on their small systems for growing their own food. Their attention is grabbed by a sex scandal involving a closed door murder. A CEO dies in a room by himself with video proof he was alone. No one can figure out how he died. But then a second man suffers the same fate… and then seven members of a corporate board. The deaths pile up in the other case but not in their own. What is the team missing? Will they capture Delilah or has she stumped them?