In the prologue, we see the events that unfolded in Vancouver before the start of "Secret Invasion #1." Once that has passed, we pick up with the attack on the FF seen in that issue, and then continue on to the rest of their story. Johnny, Ben, Franklin and Valeria have been trapped in the Negative Zone by a Skrull disguised as Sue. This Skrull seems all too familiar with the inner workings of the Baxter Building...