The machinery of Time has been repaired. Chief of Intervention Masati has her beloved Moriah back, one of Heaven's most powerful Avenger Class Host. Yet she had strayed, and for that she must remain on Earth to perform penance, and learn a more humble demeanor. Her beloved, Barna, is tasked as her overseer. Their paths will be joined by Anna, who was Moriah's closest friend in Heaven before she strayed, and together they must also protect their human charges, Peter and Melanie, when one of Hell's most powerful and vengeful angels comes to Earth to seek revenge for his humiliation in Hell due to Moriah's repatriation.