SciFi Mystery Romance Dystopian

Mari Yosoto has been keeping a dark and dangerous secret from everyone for the past three years. No one would believe her anyway, her ex-fiancé had seen to that. When a young girl goes missing on Mars, Mari must work with an old acquaintance and an eclectic group of people to complete the mission. Can she keep her secret safe or will her past traumas put the whole team in danger?