Set during an intense summer heatwave, Mercury follows a group of women as they play an evolving game of whodunit, circling around a murder that seems to exist across past, present, and future. With each retelling, the story shifts—names change, settings blur, and time bends—yet the outcome remains inescapable. As the narrative transforms into something closer to myth than memory, the lines between truth and imagination dissolve, raising questions about whether the crime is driven by passion, chance, or something more inevitable.