Hazel wanted to be safe, but Gaea was going to awake. Percy and Annabeth were stuck in Tartarus, and the Romans were going to attack Camp Halfblood. So with the help of her friends (Leo, Frank, Jason, and Piper), they close the Doors of Death and save Percy and Annabeth. Then they try to save Camp Halfblood and stop Gaea from awaking.
I LOVED LOVED this book. It is the fourth book in the Heroes of Olympus series. I love Rick Riordan's style because it’s constantly switching between characters and leave you at many cliffhangers.. I also love how the plot line goes up and down and there are many conflicts.