In the sun-scorched, post-apocalyptic Gobi wasteland where endless rolling golden dunes stretch as far as the eye can see, dotted with half-buried rusted abandoned vehicles and silhouettes of ravenous mutated beasts backlit by hazy dusk light, every drop of fresh water is a precious, life-or-death resource. Mia, a survivor with deep brown wavy hair, sun-stained skin from months of unforgiving exposure, worn dark work pants and a faded white tank top, has gone seven full days without a single drop of water, clutching a crumpled, deflated old military canteen as she teeters on the edge of death, her only driving purpose to track down the tiny blonde girl with a dark purple bow tucked in her hair, the person she swore to protect at any cost.