A young man named Kostya, attempting to take his own life in an abandoned building, accidentally becomes a witness to a shootout between two gangs. Soon, the dead gang members begin to return to him as ghostly interlocutors, sharing stories of their lives, mistakes, and regrets. Eventually, soul couriers from a mysterious organization called "Styx Delivery" arrive to transport the gang members to the afterlife. But a problem arises with Kostya: he is not on their list, because he is still alive