Imagine a world without plastic.

Imagine a world where something in the environment eats plastic.

Imagine arriving on such a world in a space ship.

The human colonists of Tawcety don't have to imagine it—they have to survive it.

After traveling light years to the Earth-like planet of Tau Ceti-e, they have only minutes to abandon ship before the native plastic-eating organism turns their space ship into a death trap of orbiting debris.
Now they'll have to survive an 18th-century way of life with the forbearance of the not-exactly hostile—but definitely not friendly—natives.