Separated in the past

Two girls were born on the same day to mothers who were best friends. They grew up being best friends for life when they got separated. The sun became bigger and attacked the earth with scorching rays of sunlight. Burning the earth to a crisp. After the sun, a virus spreader across the world. They called it the "Flare". Desperate, the mothers gave up their daughters to a organisation, called "W.C.K.D", dead Center on finding a cure.

Next moment they wake up in a box together, will they survive? Or will the pressure collapse around them?