Echo, Sierra, Victor, November and Mike wake up in their pods in a panic. They're not in their regular, complacent, doll-like state; they have no memories of who they are or any idea why they're there, but they're otherwise able to act like perfectly normal human beings. While they lack proper memories, they all have snippets of memories from their past lives.
Like you would when faced with such a situation, they hatch a plan to escape the Dollhouse and they succeed in doing so.
Meanwhile, Paul has a dream featuring himself, Caroline and Mellie (yes, as awkward as it sounds) that leads him to get thinking - then trashing his apartment. After making all this mess, he finds a bugging-devince-thing in the one place where he wouldn't really have had to make any mess. A quick visit to an expert tells him that even if anyone were able to replicate the thing (impossible) whoever was responsible was part of a much bigger and more powerful picture than Paul could possibly go up against..
That's pretty much all I'm going to say about the plot. You might guess as to the underlying aim of the escape (it's a tad obvious) but more important is the 'closure' that it results in that I don't really want to spoil. The episode reveals a few tidbits about Echo, Sierra, Victor and November's real lives, but I don't think that it personally adds very much to the overall plot. A 'filler' episode, as it were. Anyone care to disagree?