電視劇《煤氣燈》以多年未解的失蹤案為核心展開。Everyone the thought Danny had gone missing. Towards the end of senior year she vanished, leaving family and friends devastated and confused including her closest friend in the world, Becca. Gaslight picks up years later when Becca and her new husband receive an unexpected visitor during breakfast.這場突如其來的造訪揭開了塵封的傷疤，原來Danny的失蹤始終是籠罩在所有人頭頂的陰云。隨著調查重新啟動，Becca不得不直面與摯友訣別的記憶碎片，而她看似美滿的婚姻也因真相浮現開始動搖。訪客身份與案件的關鍵證據產生致命關聯，迫使所有人重新審視當年被認定為意外的失蹤事件。在追查過程中，精心掩蓋的利益糾葛與人性陰暗面逐漸浮出水面，曾經的親密關系網絡暴露出令人震驚的信任危機。Danny的真實遭遇與Becca婚姻背后的秘密形成雙重敘事張力，推動故事在現實創傷與過往謎團間交織推進。