During a financial crisis, Adrian Monk's favorite brand of bottled water goes out of business, and he goes into severe withdrawal.
To make matters worse, the San Francisco police department is also forced to fire Monk as a consultant.
Natalie learns that Monk invested his life savings with Bob Sebes, Big County Mortgage's CEO, who has just been arrested on charges of running the alleged ponzi scheme that has ruined millions of lives.
However, their first day gets off to a bad start when Monk overcharges customers by rounding up when the prices are uneven and has a disagreement with an elderly woman who complains about being charged more than necessary.
The owner angrily fires Monk because he has lost all his business for that night due to having to give all the customers their dinner free of charge to calm them down.
Monk naturally denies doing anything wrong and threatens to report the restaurant to the Health Department if he does not get his job back.
Natalie also tells Monk to stop trying to make people follow his own beliefs, and warns him that if he gets himself fired one more time, she'll stay there and refuse to work with him.
Unfortunately, an hour later, Monk shows up on Natalie's doorstep to tell her he's been evicted from his apartment due to not paying his rent.
That chance comes sooner than expected; on the way home, Monk and Natalie stumble across Stottlemeyer and Disher at another crime scene, where yet another witness in the Sebes case, Duncan Dern, has been found strangled to death in McKinley Park.
Before he does so, Monk informs Disher about the robbery, and that night, the police raid the mall and catch the thieves red-handed.
Here's What Happened Sebes knew his Ponzi scheme was on the brink of being exposed and he would surely be facing federal charges.
Anna made sure to wait until Bob returned and reattached his bracelet before taking hers off, so as a result, the readings never changed.
However, they didn't know that the bracelet monitored alcohol consumption, so when Anna had a drink while Bob was out killing Lincoln Clovis, the plan almost fell apart, but as a stroke of luck, they managed to fool Stottlemeyer with the suicide story.
Stottlemeyer then tells Monk his reasoning is still not entirely convincing but happily adds it will be enough for a search warrant, which will surely locate both the other bracelet and the larger pair of shoes, and Disher arrests the Sebeses.
As Stottlemeyer and Disher lead the couple away, Monk and Natalie stay behind, with the latter telling the former that she has made a surprise arrangement for him that she is sure he will like.