When Detective Gibbs and Nick find an FBI agent who appears to have been cuddled by Emily, the hunt for her goes up to a new level. With the help of a clue given to her by Adam Radford, Emily tries to tie all the threads while evading arrest. Nick tries to reconcile with Alice's betrayal. Can Emily save herself? Can Nick keep his family together?.
Absentia centers on an FBI agent who, while hunting one of Boston's most notorious serial killers, disappears without a trace and is declared dead. Six years later, she is found in a cabin in the woods, barely alive and with no memory of the years she was missing. Returning home to learn her husband has remarried and her son is being raised by another woman, she soon finds herself implicated in a new series of murders.