Transmigrated into another world, only to be poisoned by his own younger sister? A modern criminal investigation expert finds himself in the body of a good-for-nothing noble heir. Armed with forensic science, criminal investigation techniques, and modern tactics, he crushes every enemy in his path! He exposes his hypocritical stepmother and stepsister in the marquis's household, solves bizarre cases that baffle the imperial court, outmaneuvers princes fighting for the throne, quells court rebellions and military coups, and leads his troops to crush foreign cavalry. From a useless young noble heir to a legendary young war god, this thrilling historical series combines political intrigue, criminal investigations, and battlefield warfare. Season One has concluded, with a new adventure in foreign lands hinted at in the shadows!