Lion tells the story of a man named Saroo (Dev Patel) who, as a young boy, gets lost in Calcutta, hundreds of miles from his home. After surviving on the streets for a time, Saroo is adopted by a caring Australian couple, Sue and John Brierley (David Wenham). When Saroo grows up, he begins a search to find the family he disappeared from as a child.
Kidman, who explained that she feels one of the films main themes is the "strength of mothers," has called Lion a love letter to her own children because "it's about unconditional love."
"It's like any mother will tell you, no matter happens, where you go, how it happens, where it happens, there's always love waiting for you here," Kidman shared.
"It's great knowing that they're there," said Kidman, stressing the importance of supporting the younger generation of actress like Woodley and Kravitz. "It's just nice having all of that intertwined."