Pinpin, a small tinkerer made of found objects, and Matilda, an origami yellow-billed magpie, reside in a backyard full of abandoned items. One day, an alluring bottle cap flips over the fence and into their yard. The tenacious tinkerer and the mischievous magpie both decide they must have it for themselves, initiating a rivalry where they test their limits for the treasure they have desperately searched for.