The murder of an NYPD detective brings Nichols (Jeff Goldblum) and Stevens (Saffron Burrows) to a sleepy seaside town, ruled by one of Nichols' old foes - an Irish mob boss (Kevin Conway) with a reputation for eluding justice. Nichols and Stevens uncover a host of shady characters in Broad Channel, all of whom want something
from Jackie, even though they've already become his pawns. At the center of the case is Moira Boyle (Marin Hinkle), Jackie's former secretary who longs to return to her former boss's good graces and her son Eddie (Thomas McDonell), a recovering junkie looking for a second chance. Nichols and Stevens also come into conflict with
Atwater (Adam Trese), a fellow detective from Field's precinct who sees their presence as an intrusion on his turf. Atwater warns Nichols and Stevens that Broad Channel is an isolated community where people will do anything to protect their own. As their investigation deepens, Nichols and Stevens come to realize that
the bonds of community aren't enough to prevent blackmail, betrayal and murder.