The Rising of the Shield Hero season 4 episode 3
Episode title: A True People
The Schiltwelt Castle is shaken by a poisoned breakfast room disturbance. Atra, who is incensed by the ugly war of words between the various factions, tries to blackmail the heavy hitters and speak highly of Shobun's greatness. Shobun then discovers the real culprit through a “secret spy.”
