Serenity Island Chapter 1 Walkthrough - Land of Peace and Purity

Accept the quest by heading to the eastern shore from the Warp Spire "Stellar Fishing Ground Trail" in the Abandoned District. A cutscene will start.

Go talk to the Pieceys located on the west side of the island. There's no nearby warp spire, so you'll need to walk there.

Chase the strange Puppy Piecey that appears during the conversation. A cutscene will trigger once you reach a certain location.

Ride the Rainbow Seal to Serenity Island and speak with the Piecey standing in front of the village.

Talk to the Village Head, Terra. You'll hear about the outbreak known as Dirty Thread Disease and the Rainbow Springwater Therapy being used to cure it.

Follow Bootsie as she tours you around the village. Partway through, you'll meet Murmur working at the Soakville Bathhouse.

After the tour, choose "Rest" in front of Thuddy Squash Cabin. In the middle of the night, the Puppy Piecey will visit you.

Follow Puppy Piecey. At the Heart of Spring, you'll overhear a conversation between Terra and Granny Bubbles and learn that Rainbow Springwater Therapy has no effect on the Dirty Thread Disease.

Fast-forward time from night to day and talk to Bootsie. You can quickly advance time by examining the golden orb near her.

Go to the Water Quality Lab and talk to Frank and Stan. You'll need to purify four contaminated Springbloom Buds on Serenity Island.

Open the Heart of Infinity to get the Sketch and craft the Awaken Springbloom Clothing "Springbloom Enchantment." You won't need Whimstar when getting the Sketch.

Head to the four Springbloom Buds and purify the surrounding Esseling. The order doesn't matter. Note that for the "Springbloom Buds at the Old Ruins," you'll need to go through the "Relics Cavern" at its base.

To reach the Springbloom Buds, you'll need to use the Awaken Springbloom ability on the Springblooms nearby. When the gauge turns green, press the Ability button again and ride the water up to higher areas.

After the Purification is done, head to the promised location to meet Murmur.

Talk to the Rinse-Free Rebels who refuse treatment and persuade them. After convincing three of them, talk to Murmur.

Return to the Heart of Spring and report that the Purification is complete. After the conversation, ride the spring water to Steamville to complete Chapter 1.