As the once-in-a-millennium “Dark Tide” threatens to devour the world, elemental crystals and the Heart of the Ocean become civilization’s last hope. Luffy and his crew sail the Going Merry, starting with the traps of an underwater altar, crossing the bitter winds of the far-northern ice fields, braving the deadly pressure of the Death Trench, and facing relentless pursuit by the Blackwater Organization and fierce attacks from the Dark Pressure Beasts.
Along the way, the mysterious youth Ling Yun appears with an ancient crystal, a giant deep-sea whale becomes their guide, and the betrayal of the Mist Guardian and secrets of an ancient civilization are gradually revealed. From activating the Guardian Core in an ice tower, to breaking the barrier with the Eye of Darkness, to confronting the source of the darkness in a deep-sea castle, the crew uses sword energy, flames, Haki, and ingenuity to overcome every obstacle. Through one life-or-death trial after another, their bonds become the strongest defense against the darkness.
This is more than an adventure to find the power that will seal away the darkness. It is also a rousing anthem about courage, trust, and protection. When dark tentacles wrap around the world, only companions who fight side by side can bring the light back to the sea.
