The team are asked to move an improved concrete sarcophagus to replace the old deteriorating one at the Chernobyl Nuclear Power Plant.
The team is hired by the Department of Defence to test the security at Fort Knox by trying to break in and steal a precious artefact.
Following a violent bank robbery, Abbie and Ichabod begin searching for a mysterious coin that may be more powerful than it seems. Meanwhile, Irving must choose between his family and the greater good.
Following an art restorer's mysterious death, Ichabod and Katrina are reminded of a friend (Michelle Trachtenberg) from their past; a visitor at the police precinct shocks Abbie.
Gibbs and the team work to clear the name of a retired Marine when cyanide is found in one of the care packages he sends to active-duty Marines.