What's The Plot Of Watchmen ?

Watchmen is about a retired team of masked vigilantes, one of whom gets assassinated in the beginning of the movie. The rest of the movie is about Rorschach investigating into the murder of "The Comedian" as a mysterious plot unfolds in the backdrop of the movie, a bigger conspiracy takes place. The vigilantes are now retired and leading lives of solitude away from the mayhem of the crimes that take place in the city. Rorschach's suspicions are not laid to rest and he inexorably leads us into the movie's narrative introducing the audience to the disease and corruption that has laid waste to the city. We are introduced to the dubious natures of the super heroes who parody the real world in their actions and are as ruthless themselves as the real world is cruel. Then we peek into their human natures, which sometimes make them monstrous and as vulnerable as us, a position that the audience can relate to.