The Lost Bloodline

Zena Jackson is broken. Years of foster homes and abuse have left her bruised and broke. So when Jasper, the new student at her school tells her she's different, that there may be a method to the madness in her life, she believes him.
Marlee McLean is scared. Jasper is dead, and Zena is the only one she has left. Her boarding school has kicked both of them out because of a small accident that ended in Zena exploding a building and a couple stolen cars courtesy of Marlee.
Poppy Underwood is bored. Her whole life has been spent at Camp Halfblood training for something. She doesn't want to want to inherit her fathers title as lord of the wild and she most definitely doesn't want to be like other nymphs or satyrs. She wants to go on a quest, so when her boyfriend gets sent out to retrieve not one but two demigods of unknown bloodlines she can't help but feel jealous.
50 Years ago, The seven saved the world and brought peace to the world. But the world has fallen into shambles now that the seven are gone. Now there descendants are left to fight to put the world back together.