the joke's on us

Vex Valentine and his twin sister Lucy have a hard enough life as it is. they have to achieve Perfection at all time they are told constantly by their abusive parents. but when vex finds a mysterious letter while cleaning out their attic he discovers that the woman him and his sister have been living with for 16 years is their aunt. but that was a year ago now he is 17 and working for a military base when he starts having psychological problems while he's dealing with the death of his best friend