Titus Groan first catalyst is the birth of Titus Groan, the heir to Lord Sepulchrave, which interrupts the centuries-old daily rituals which are practiced at all levels of the castle's society, from the kitchens to the Hall of Bright Carvings in Gormenghast's upper reaches. Though he is the title character and integral to the plot, Titus appears only infrequently as an infant during his first two years of life. The second is Steerpike, a ruthlessly ambitious kitchen boy, whose rise drives the plot of "Titus Groan". His escape from the kitchen during the castle celebration of Lord Titus' birth introduces change into
Titus Groan to tell the twins that they were invited as well, strengthening their feeling of bitterness towards Sepulchrave and Gertrude). He intends to lock the doors to prevent an escape, and then come through the window and save everyone inside from the fire, appearing as a hero and possibly strengthening his position and granting him more power in the castle. Everything goes according to plan: the entire Groan family (including the Earl and his heir) and most of the retainers are saved. Sourdust, the old Master of Ceremonies, dies of smoke asphyxiation and all the books in the library are destroyed