In Elesa Knowles’s Red Thread, a shattered afterlife known as the Second World becomes the battleground for humanity’s soul. When a brutal massacre ignites war between rival Domains of Healers, Powerhouses, and Tacticians, Esperanza, a gifted surgeon whose soul manifests as radiant blue healing threads, is thrust into a conflict that tests the limits of mercy, memory, and sacrifice. As alliances form between the pacifist Blue Domain, the samurai-ruled Red Domain, and the cunning White Domain, a radical faction known as the Messengers seeks immortality through orchestrated death games, declaring that only “Angels” deserve to exist. Bound by red and blue soul threads that transcend time, love, and even death, Esperanza and the young heir Theo must confront fanaticism, moral corruption, and their own fading identities in a sweeping epic of war, redemption, and the fragile hope that humanity is still worth saving.