Isa, 20, owns nothing but the contents of her backpack and a generally cheerful, “grin and bear it” attitude to life. Bumming her way from town to town, living from hand to mouth, she washes up in Lille. Everywhere she goes, she adds a new block to the structure she is building, patiently and instinctively, out of her curiosity and generosity. In Lille she meets Marie, a girl from the north of France, aged 20 like her and a loner like her, but for different reasons. Marie is untamed, scalded, outraged by the role that life has ascribed to her.