Take Hirako (Ping Zi Zhang, Hirako Take) was a former CCG First Class Ghoul Investigator who resigned. He used to be in a band with Kishou Arima. After the incident where he and Kishou were killed by a Vengeful Spirit called "Gafun", Ping took over his job as a Ghoul Investigator. Now he fights against Ghost that invade the human world. He uses a sword as his main weapon but is also good at Kung Fu. Take has a son named Tsubasa who is a high school student who loves fighting games and plays the role of Ping's partner in their investigations. Tsubasa can transform into a robot called TRiP which contains a computer system that allows him to communicate with Ping. Together they use this robot to fight against evil ghosts! Take and Kishou were friends since college and used to be in a band together before Kishou became too busy with his work to have time for music. They would often get together to talk about cases and even go on missions when necessary. One day they went to check out a Gafun that had invaded a nightclub but they weren't prepared for what happened next...