One Punch Man 2nd Season's commemorative recap special.

Gol D. Roger was known as the "Pirate King," the strongest and most infamous being to have sailed the Grand Line. The capture and execution of Roger by the World Government brought a change throughout the world. His last words before his death revealed the existence of the greatest treasure in the world, One Piece. It was this revelation that brought about the Grand Age of Pirates, men who dreamed of finding One Piece—which promises an unlimited amount of riches and fame—and quite possibly the pinnacle of glory and the title of the Pirate King. Enter Monkey D. Luffy, a 17-year-old boy who defies your standard definition of a pirate. Rather than the popular persona of a wicked, hardened, toothless pirate ransacking villages for fun, Luffy's reason for being a pirate is one of pure wonder: the thought of an exciting adventure that leads him to intriguing people and ultimately, the promised treasure. Following in the footsteps of his childhood hero, Luffy and his crew travel across the Grand Line, experiencing crazy adventures, unveiling dark mysteries and battling strong enemies, all in order to reach the most coveted of all fortunes—One Piece.

When you look up at the sky, what do you see? A blue sky? Freedom? A hopeful future? The people of Tokyo see none of these. Instead, an ominous alien mothership looms overhead, engulfing the city skyscape. Three years ago, they came. The arrival of the "Invaders" sparked the greatest war humanity had ever faced—one that threatened to end the world. The Japanese government scrambled to fight the Invaders. Weapons were mass-produced, sparking controversy and pacifist movements. That day, everything changed. And yet, nothing has changed. Kadode Koyama and Ouran Nakagawa live their final days like they always have: going to school, playing with friends, and doing what any carefree high school girl would do. As they grow up, they come to learn what it truly means to be an adult, in a world where adults seem to be demons who only deceive and destroy. They come to learn the real threat to humanity is not the Invaders, but humanity itself.

The balance of the world is deeply shaken when malevolent gods known as the Four Perils break their seals and disappear together with eight million minor deities. In the absence of gods, lands become barren and famine looms in the country of the Eight Immortals. In order to restore the fragile harmony, kashi—gifted dancers and singers—must hunt the missing gods in other realms, use their performance skills to charm the deities, and seal them using the power of their rosaries. Although a master dancer, Ichiyou is ridiculed by his peers for his lack of singing talent. Nonetheless, the young kashi is tasked by the Eight Immortals to bring back the Four Perils before the world plunges into complete chaos. Helped by his familiars Tenkou and Kaka, Ichiyou embarks on the perilous mission given to him, with his search leading him to modern-day Japan. If he hopes to save the world, Ichiyou must also uncover the truth behind the Four Perils' disappearance—but this event seems to be disturbingly intertwined with his own past.