When fifteen kids are forced to go to a Friday night detention, they find a little more than just punishment for bad behaviour. They find a dead body. With a major blackout spreading across the area, with the school locked up for the night, the killer might just still be in the school... or the killer might be one of the kids themselves.

Piper, Hazel, Nico and Leo run into trouble and then quite literally the Avengers. After being set a long quest, join the demigods as they join the mortal world and hopefully somewhere down the line, save it.