Assassin's Creed Underworld unveils the story of Master Assassin Henry Green/Jayadeep Mir, the son of Indian Master Assassin Arbaaz Mir and his wife Pyara Kaur (the two debuted in Assassin's Creed: Brahman), six years before the events depicted in Assassin's Creed: Syndicate.
Assassin's Creed: Underworld menampilkan cerita tentang Master Assassin Henry Green/Jayadeep Mir, anak dari Master Assassin Arbaaz Mir dari India dan istrinya Pyara Kaur (keduanya memulai debut pada Assassin's Creed: Brahman), enam tahun sebelum kejadian yang digambarkan dalam Assassin's Creed Syndicate.