Wiola lives in a close-knit agricultural community. Wiola has a black cat called Blackie. Wiola's father was a deserter but now he is a taxidermist. Wiola's mother tells her that killing spiders brings on storms. Wiola must never enter the seamstress's 'secret' room. Wiola collects matchbox labels. Wiola is a good Catholic girl brought up with fables and nurtured on superstition. Wiola lives in a Poland that is both very recent and lost in time. 'Swallowing Mercury' is about the ordinary passing of years filled with extraordinary days.