Crystal Inferno (2017) online

At the 20th floor of a skyscraper, a gas leak has started a fire. Anne and Ben Bronson, two teenage kids, are trapped in a fiery inferno 20 storeys above the ground, while the fire is spreading throughout the entire building. From the 60th floor, their parents, Brianna and Tom, who were about to sign their divorce papers, will have to fight together to save their family from the flames