A famous lawyer calls for Kogoro at a fancy hotel asking him to follow his wife who may be having an affair. Kogoro, Ran and Conan then going to the man's house discover that the wife in question has been murdered? Who did it, and how was it done?

Ran tells Conan she's meeting someone at a coffee shop. Conan suspecting something, follows Ran. Meanwhile, a murder is committed at the coffee shop. Someone still there committed the murder. But who?