chapter 274 there is always a solution to a problem

"Master, these three killers eliminated the Ning family's secret sentry without us noticing at all, but we found this on their bodies!" Dong Yu had a look of fear on his face, and then he took out the darts that were nailed into the bodies of the three killers! "This...is this a dart?" Ning Jianyi took the dart and said in surprise! "This man's moves were clean and efficient. All three killers were killed with one blow!" Dong Yu said in a deep voice. In the Ning family, there was no one else...