Rachel flees NYC after another traumatic breakup and arrives at her parents' home in San Diego. They are adamant to see their wayward daughter settle down with a nice girl. Rachel goes on several blind dates that misfire badly. She finally lets her mother set her up with Christine, a typical Californian girl. Much to Rachel's chagrin, mom is right! Meanwhile, Rachel's friends wait for her to screw up the relationship. They know, even if she won't admit it, that she still carries a torch for her ex-girlfriend and they're not sure what would happen if she reappeared to reclaim Rachel.

When a diabolical English lord is murdered, Sherlock Holmes and Watson must unexpectedly exchange roles in order to solve "the perfect locked room mystery.