The story takes place in the picturesque Santa Barbara, where Sean (James Rod James Roday) is born into a police family. Unsurprisingly, his father Henry (Corbin Bernsen), a criminal policeman, places all his hopes on his son in the hope that he will succeed his father. From a very young age, Henry began to consciously train Sean's ability of observation and logical reasoning, so when Sean grew up, he still had the innate ability of criminal investigation. To others, Sean's talents are tantamount to "special powers", but only Sean himself knows how much pressure and burden they put on him. In the end, however, under the influence and help of his good friend Gus (Duller Hill Hill), Sean embarked on the road of criminal investigation.