Yoshito grew up with his mother Yasue after his father passed away. His mother ran a yakiniku (grilled meat) restaurant that his father had left behind. Yoshito enjoyed eating his mother’s cooking and their restaurant was loved by many people. Things changed after popular food critic Furuyama Tatsuya published false statements about their yakiniku restaurant. Due to that, their restaurant saw a sharp drop in customers. Yasue worked hard to recover business for the restaurant. Due to Yoshito’s behavior in wanting attention from his mom, Yasue decided to shut down the restaurant. 18 years later, Yoshito lives alone and he works as a freelance writer. One day, he takes work for a new online foodie website. He works with editor Takenaka Shizuka. Their first assignment involves yakiniku. Around that time, Yoshito hears that his estranged mother Yasue has collapsed.

Saya Toma (Erika Toda) is a female detective with an IQ of 201. Takeru Sebumi (Ryo Kase) is a career detective with a distinguished background. They work on cases by postulating the “SPEC” of the unknown criminals and then deduce the criminal’s unknown “SPEC” to make arrests. A mystery occurs when bodies are found on a cruiser in the ocean. Saya Toma and Ryo Kase of the Tokyo Metropolitan Police Department are brought in to solve the case.