Seasong 1・Watson is a medical show with a strong investigative spine, featuring a modern version of one of history's greatest detectives as he turns his attention from solving crimes to solving medical mysteries..

Seasong 1・Rich heiress Reiko Hosho lives a double life as a novice detective, fighting crime under Inspector Kazamatsuri—also from a wealthy family. After work, Reiko sheds her pantsuit to don a lovely dress for dinner each day. Difficult cases force her to confide in her butler Kageyama, who proceeds to savagely ridicule her inability to solve mysteries, all while brilliantly unraveling each case himself.