When his younger sister, a single-parent, moves into the second apartment with her 5-year-old daughter Nina, an unexpected friendship develops between Joseph and the uncared-for little girl.When his younger sister, a single-parent, moves into the second apartment with her 5-year-old daughter Nina, an unexpected friendship develops between Joseph and the uncared-for little girl.When his younger sister, a single-parent, moves into the second apartment with her 5-year-old daughter Nina, an unexpected friendship develops between Joseph and the uncared-for little girl.