Complex sentence: On one journey, he finds six ancient stones and brings them to Kini Nui (the heart of island) and joins them to unknowingly trigger a beacon for six canisters floating in the ocean to wash up on the island.
Split into simpler sentences: On one journey, he finds six ancient stones and brings them to Kini Nui, the heart of island. He joins them together and unknowingly triggers a beacon for six canisters floating in the ocean to wash up on the island.