Two lovers from enemy clans are handed a scroll with ten names on it, and the only way to cross off a name is to kill the person wearing it. The show grinds through every single death with the weight it deserves, never rushing past the moment when a character realizes they have to murder someone they might have respected. By the end, the truce between Kouga and Iga doesn't just fall apart, it was always a lie, and Gennosuke and Oboro watch their people die for a war that was decided before they were even born.
Two rival ninja clans have maintained an uneasy peace for three hundred years, held together only by the love between Gennosuke of Kouga and Oboro of Iga. Their relationship proves fragile when a mysterious decree resurrects an ancient conflict, forcing ten warriors from each clan into a death match with only one objective: eliminate every opponent whose name appears on their scroll. There's no negotiation, no escape clauses, no mercy. Blood is the only currency that counts. As former allies become mortal enemies, Gennosuke and Oboro find themselves trapped on opposite sides of an impossible war. The couple must choose between personal loyalty and clan honor while watching their comrades fall one by one. Each battle strips away the hope that peace might survive, and every death complicates the simple question of who, if anyone, can walk away from this. Basilisk combines visceral action with genuine emotional weight, exploring what happens when love collides with duty and survival demands the unthinkable. This is ninja warfare at its most brutal and human.