When communications with the Venkatsen Research Group were lost, the U.S.S. Enterprise was sent to investigate. In a system with 47 planets, the transporter is not usable, so Kirk and crew take a shuttle to Hohweyn VII.
After losing contact with the Venkatsen Research Group, the USS Enterprise was sent to investigate.  Due to the lack of transporter functionality in the system's 47 planets, Captain Kirk and his crew embarked on a shuttle mission to Hohweyn VII.