Halo: Vendetta is a story co-written by Stel' Vadam, Gruntijackal and SPARTAN-118. It follows the events of two Sangheili, Stel 'Vadam and Ral 'Daman attempting to assassinate a Jiralhanae Chieftain, Keflus, the successor to Tartarus. After that, they seek to destroy the Jiralhanae once, and for all. And years before, on the planet of Reach; brother to the Arbiter Thel 'Vadam, Rola 'Vadam seeks to uncover the secrets that the Covenant have kept since it's creation.