能介绍一下变速杆的剧情吗？
变速杆为一部2020 / 美国 / 科幻,惊悚,恐怖的影片，由Jacob、Leighton执导，当前状态：HD，页面SN 资源等播放通道可随时切换。A young woman who experiences painful and gruesome side effects after an experiment with time travel goes wrong. She loses control and shifts through time at random.