Main Story Walkthrough

Visit The Town and choose a profession.
Obtain the Ancient Homestead Key from The Ancient Farm Temple.
Repair the bridge to The Forest and head into The Forest.
In The Forest, collect the Tablets from The Overgrown Forest Temple, The Deserted Forest Temple, and The Hidden Forest Temple. Once you have all three, go to The Ancient Forest Temple to obtain the Ancient Grove Key.
Repair the general store in The Town to purchase a cable, then repair the cable car to reach The Mountain.
On The Mountain, collect the Tablets from The Forgotten Mountain Temple, The Ruined Mountain Temple, and The Forsaken Mountain Temple. Once you have all three, go to The Ancient Mountain Temple to obtain the Ancient Peak Key.
Repair the lighthouse in The Town to obtain the Lost Jungle Island Map. Purchase the Boat Motor from the Fisherman’s Shop.
Repair the boat in The Farm to travel to Jungle Island.
In The Jungle, collect the Tablets from The Damned Jungle Temple, The Haunted Jungle Temple, and The Cursed Jungle Temple. Once you have all three, go to The Ancient Jungle Temple to obtain the Ancient Ember Key.
With all four keys, go to the temple in town and uncover the mystery of Luma Island.