When a car careens out of control over an embankment, killing a middle-aged man in the driver’s seat, Megan learns that all is not well on a pretty suburban cul-de-sac. Looking past the perfect picket fences, she and her team are startled by the lives spinning out of control and the ever-changing suspect roster.
Former police detective Adrian Monk (Tony Shalhoub), whose photographic memory and amazing ability to piece together tiny clues made him a local legend, has suffered from intensified obsessive-compulsive disorder and a variety of phobias since the unsolved murder of his wife, Trudy, in 1997. Now on psychiatric leave from the San Francisco Police Department and working as a freelance detective/ consultant on difficult cases, Monk hopes to convince his former boss, Captain Leland Stottlemeyer (Ted Levine), to allow him to return to the force. Stottlemeyer, who wavered between admiration for Monk and annoyance at his eccentricities during the first season, is becoming more of a friend to Monk as the series develops, frequently calling him in to help, as much for Monk’s benefit as for his own. However, he knows Monk’s limitations as well as his strengths and may still harbor doubts about the wisdom of allowing Monk to carry a gun or subdue a perpetrator. Stottlemeyer’s second-in-command, Lieutenant Randall Disher (Jason Gray-Stanford), also seems to be developing both admiration and compassion for the man he once labeled “the defective detective.”
查理死了，只留下一所海边别墅给他弟弟艾伦（乔恩·克莱尔 Jon Cryer 饰）。因为负担不起房子的保养费，艾伦在老妈的怂恿下，决定出售房子。这天，艾伦终于收到查理的骨灰，家里却来了个不速之客。这个突然出现的男人叫沃顿（阿什顿·库彻 Ashton Kutcher 饰），有钱多金，身材好长得帅，却企图自杀来挽回要离婚的妻子。在艾伦的劝阻下，沃顿决定活下来，还把艾伦的别墅买下来了。就像以前投靠哥哥查理一样，艾伦也以“朋友”的身份，“赖”在已经属于沃顿的这所海边别墅不走了，加上已经17岁的儿子杰克（安加斯·T·琼斯 Angus T. Jones 饰），好汉两个半的生活又开始了。