Three modern day Dublin men endure listless and unexciting lives. Their only enjoyment comes from staging reenactments of the Easter Rising. The men are gearing up for a full dress rehearsal of the events of Easter week when a mysterious box transports them back in time to 1916, just before the Rising. No sooner have they arrived in the past than they commit a monumental blunder that changes everything. Realising that they have wrecked the Rising before it has even begun, they must somehow concoct a plan to keep history on course.