Echoes Between Worlds is a story tale that only appears in New Game+, at the very start of Act 1. It sends you to the island in Lake Izuhara to meet Baku the Voiceless, the merchant who trades gear for Ghost Flowers.
Part 26 of 26 in Jin's Journey
Start New Game+ and Jin senses that someone is waiting for him at Lake Izuhara. Travel to the island in the lake and meet Baku the Voiceless. Once you've met him, his shop is open for the rest of the run.
Baku is where you spend Ghost Flowers, so this tale opens the New Game+ shop. Do it early so the flowers you earn from other tales have somewhere to go.
Look for the island in the middle of Lake Izuhara, in Komoda prefecture of Izuhara. In New Game+ it comes before The Warrior's Code, so you can do it right after the Prologue.
Image: Sucker Punch Productions / PlayStationA New Horizon
A New Horizon is the bridge between Act 1 and Act 2, where Jin and Lord Shimura ride out from Castle Kaneda and plan the push into Toyotama. It hands you three goals for Act 2 and opens the northern region.
Image: Sucker Punch Productions / PlayStationBlood on the Grass
Blood on the Grass is the Act 1 tale where Jin looks for the Straw Hat Ronin and reunites with his childhood friend Ryuzo. It rewards the Ronin Attire and leads straight into The Tale of Ryuzo.
Image: Sucker Punch Productions / PlayStationHammer and Forge
Hammer and Forge is the Act 1 tale where you retake Komatsu Forge so Taka can build a tool to climb Castle Kaneda. You rescue his assistant Yukio and the town's hostages, then defend the forge against a Mongol warlord.
Image: Sucker Punch Productions / PlayStationPrologue
The Prologue is the opening tale of Ghost of Tsushima, set during the Mongol landing at Komoda Beach in 1274. It teaches stealth, sword combat and horse riding, introduces Yuna, and sends you on your first attempt to save Lord Shimura.