Tulip's marriage, Jesse considers killing Viktor before Cassidy persuades him not to, claiming Tulip has never stopped loving Jesse (both Tulip and Cassidy keeping their previous sexual encounter a secret from Cassidy). However, after they leave, the Saint of Killers shows up an kills Viktor, and his daughter informs the Saint of Killers where to find the trio. At Denis' house, Jesse, Tulip and Cassidy are just able to escape before the Saint of Killers shows up; while Jesse seeks a replacement soul for the Saint of Killers in an effort to stop his rampage, Tulip learns that Denis is Cassidy's son. After Jesse uses a fragment of his own soul to control and imprison the Saint of Killers, he, Tulip and Cassidy participate in a game where people get shot at while wearing a bulletproof vest, and they trick the other players in order to rob their money. Afterwards, Denis tells his father that he is dying from congestive heart failure and wants to be turned into a vampire to survive, but Cassidy declines. On a phone call, Cassidy asks someone called Seamus for advice on how to handle Denis, and he is advised not to turn him into a vampire. However, Cassidy declines this advice and turns Denis into a vampire, allowing Denis to survive an attempt on the group's lives by assassins working for the Grail, a powerful organization working to preserves the lineage of Jesus Christ for the apocalypse and fights relentlessly any conflicting lore, which includes Jesse and Genesis. As Jesse forms a truce with Grail leader Herr Starr, and realises the man in the dog costume whom he had rejected was in fact the actual God in disguise, Cassidy bonds with his son, who appears to have no control over his vampire desires. However, after the Saint of Killers is freed and comes after the group again, he is sent back to Hell by a superintendent from Hell associated with Herr Starr. An ambulance that Jesse called to take his friends to the hospital subsequently then brings Tulip and Cassidy to Herr Starr instead, who reveals his plans for Jesse to serve as the new messiah to them. In the aftermath, as Cassidy and Tulip decide to leave Jesse, Cassidy realizes that Denis cannot control his vampire desires (and had been seeking for form a vampiric coven via followers of the dating service Les