Beneath the Freezing Rain, I Tore Off the Traitors' Masks

Chloe is murdered by cheating boyfriend Jack and traitorous friend Mia in a global flood. Reborn three days early, she sells all assets for supplies and fortifies her flat. As floods drown the world, she feasts indoors on wine and grilled food while her betrayers freeze and suffer. She defeats invading trespassers and escapes safely.