Huo En, a young gaming enthusiast, transmigrates into a Western fantasy world and finds himself as a little lizard awaiting dissection in an anatomy class at Grey Tower Academy. The Player System activates, and his beginner gift, "Sharp Teeth," is equipped, increasing his bite force by 300%. With one bite, he shatters his shackles and escapes into the sewers. By devouring magical beasts, he accumulates evolution points. By creating fear, he earns fright points to open loot boxes and draw skills. Each purification of his bloodline brings him one step closer to becoming a giant dragon. From swarms of rats in the city, the black market, and the arena, to fish wyrms, thunderstorm eagles, and ancient earth dragons, he devours and evolves his way forward, becoming a giant lizard, a drake, and a wyvern. Ultimately, he becomes a mighty dragon with an invincible body and the ability to breathe icy blasts and unleash flames.