In 'Ushio to Tora,' we follow Ushio Aotsuki as he grapples with a massive, supernatural tiger-like creature that alternates between stalking and aiding him. Bound by a centuries-old legacy, Ushio's family guards a Shinto temple where his samurai ancestor once sealed this formidable beast with the 'Beast Spear.' When Ushio accidentally releases the creature, he is thrust into a world of monsters and battles. Reluctantly allied, Ushio and Tora navigate a complex relationship while facing mythological adversaries and Tora's struggles to adapt to the modern era.