Bahadir Bey is the cousin of Ural Bey who was punished in earlier episodes of season 4. Bahadir Bey attacks Cavdar tribe along with his banished son Sancar and arrests Aslihan (who had been appointed as Bey of Cavdar tribe by Ertugrul and Cavdar Beys). After seizing power at Cavdar tribe, Bahadir Bey invites Ertugrul Bey (who is now the Frontier Bey appointed by the Sultan) to a feast. Bahadir plans assassination of Ertugrul while he is on the way to Cavdar tribe. Ertugrul comes to know about the take over of Cavdar by Bahadir Bey and the assassination plot. He takes 2 Alps with him (Abdur Rahman and Bamsi) and reaches Cabdar tribe. He exposes Bahadir Bey's secret association with Governor Ares and the destruction of catapults (which were being built under Ertugrul's command)-Samsa alp loses his life while protecting the catapults. After questioning Bahadir and other Beys who supported him, Ertugrul Bey puts them to sword and releases Aslihan khatoon and Turgut from captivity. This is one of the best scenes in Ertugrul season 4 (episode 31).