Farrah Tamboli, a former overqualified police detective; Alexander "Ace" Heist, an ex-criminal turned good; Mara Cornett, an ex-CIA agent; Matteo Valazaquez, an ex-Special Forces agent; and Isagi Kaneko, a retrieval specialist, work for a covert agency called the International Covert Operations Bureau, also known as ICOB. Only a select few are recruited for this agency, but do they have what it takes to prove they belong?