A Plummet can be obtained by removing Stone, by asking them from Friends or by buying them for a Totem.
It can also be received as a Reward from the Treehouse and as a Reward in the following Quest:
A Plummet is needed while building the following Builds:
Plummet are needed during de following Quests:
The amount of Plummets you have, can be found in the Inventory/Craft.