Hayley Udall tries to make ends meet for herself and her 14 year-old daughter while providing alimony for a horrible ex-husband. She wishes her problems with her ex could go away, and upon venting her frustrations one night, finds herself tangled up in a pact with two people (Melanie and Kevin) to eliminate each other's problems. It seemed innocent wishful thinking before, but as people end up dead-including Hayley's ex-husband-Hayley is trapped to fulfill the pact or risk taking the fall for murder. She tries to clear her name but the police (led by Detective Marks) is eyeing her for her ex-husband's death as well as others. Then Melanie abducts Hayley's daughter as leverage for Hayley to follow through and kill one last person. With Detective Marks trying to find the truth, Hayley must hurry to save her daughter and find a way to avoid murder.
塔克中尉(丹尼斯·奎德 Dennis Quaid 饰)性格冲动,蔑视威权,但他同时是开发缩微飞行器技术的“阿尔法计划”的主驾驶员。塔克酒后胡作非为导致记者女友莉迪亚(梅格·瑞恩 Meg Ryan 饰)愤怒离去,当日的工作则同样遭遇了挫折——一群匪徒闯入研究中心,试图将研制中的缩微飞行器芯片夺走,研究员为了保住芯片,将已经进入缩微状态的塔克和飞行器注入了一名路人杰克(马丁·肖特 Martin Short 饰)的屁股,杰克是一名神经过敏的超市收银员,塔克在杰克的身体内部游走,帮助其躲过匪徒的追踪后返回研究中心求助,然而中心为利益决定放弃杰克体内的塔克,二人无奈只得自救,他们向莉迪亚求助,想要在塔克的氧气耗尽前夺回被抢走的芯片,令塔克恢复原来的大小……