The request refers to the 2022 Swedish action thriller Black Crab (Svart krabba). In a post-apocalyptic world ravaged by a civil war, the story follows a desperate mother turned soldier on a suicide mission. The Mission of the Black Crab
Caroline Edh is a former speed skater who lost her daughter, Vanja, when the war broke out. Recruited by the military for a near-impossible task, she is told her daughter is waiting for her at a research base on the other side of a frozen archipelago. Black Crab YIFY
They must cross a sea of ice that is too thin for vehicles but too thick for boats. The request refers to the 2022 Swedish action