Can anyone give me a summary of Catching Fire by Suzanne Collins?

I've read both of The Hunger Games books, and loved them, but am honestly having trouble remembering what happened. I'm getting ready to buy the third one, Mockingjay or whatever it's called, but want to refresh my memory on the first two so I'm not completely lost. I'm more than halfway through with the books I'm reading now, Clockwork Angel by Candra Clare and Fragile Eternity by Melissa Marr, and have a feeling it'll be finished real quick<3