At the end of Rick Riordan's The Heroes of Olympus, Book 3: The Mark of Athena, Percy and Annabeth confronted their fate and dropped down to Tartarus to shut the Doors of Death from the inside, but what if they accidentally crossed the line?

About a decade has passed since the Archangel Tyrael destroyed the Worldstone. Deckard Cain has done his best to keep his mind off the horrific events he and the six heroes had endured. Now accompanied by the young Leah, Cain finds a mysterious land.

Mike was a happy man for the duration of his short life. When he was shot and killed in the middle of a gang war, he could never imagine that one of his deepest desires would come true.