It's been two years since the Battle of New York and Steve Rogers is having tough time adjusting to the modern lifestyle. While on a mission to free hostages aboard a S.H.I.E.L.D. vessel from pirates led by mercenary Georges Batroc together with agent Natasha Romanoff, Steve Rogers realized that Natasha Romanoff secretly extract data from the ship computer to Nick Fury. Rogers confront Fury and then is briefed on the Operation Insight.
Unable to decrypt the data recovered by Romanoff, Fury become suspicious about the Operation Insight. While on the way to meet Maria Hill, Fury was ambushed by assailants led by a mysterious assassin called the Winter Soldiers and he escaped to Rogers' apartment warns Rogers that S.H.I.E.L.D is compromised before gunned down by the Winter Soldier.
During the investigation, Rogers and Romanoff realized that Hydra was amongst S.H.I.E.L.D before they were attacked. Rogers and Romanoff enlist the help from Sam Wilson, a former military pararescueman whom Rogers befriended, and acquire his powered "Falcon" wingpack. They interrogate Zola who told them that HYDRA has a system to identify HYDRA's threat and Operation Insight is to eliminate the threat based on the specially developed data mining algorithm.
While on the way to the S.H.I.E.L.D headquarters, Rogers, Romanoff and Wilson was ambushed by the Winter Soldier before Rogers facing the Winter Soldiers on a one-on-one fight and revealed who the Winter Soldier is.
I don't want to spoil the ending for those who has yet to watch Captain America 2: The Winter Soldier, but definitely I find it interesting that they manage to link Captain America 2 with Avengers before leaving clues for the sequel to the Avengers. To me, the story is well plotted and in my opinion I think that Winter Soldier is really nice action packed movie and the 130 plus minutes really worth spending.