Four college students are found dead at a campsite. It appears they were poisoned, but CSIC can't figure out how it was done. Their investigation brings them to Lei's mentor. Is she involved somehow?
A missing persons case is re-opened when the foot of the victim is found. The case also brings up painful memories from Genie's past when it appears her missing brother is involved.
A cancer patient apparently kills herself by jumping of the roof of the hospital. CSIC officer Hsin doesn't believe this is the case. The team pursues both causes to determine the truth.
The severed finger of a corrupt business woman is sent to her son with a 50 million huan ransom. The chief suspect winds up dead after the CSIC questions him. Can the CSIC team solve the case before the deadline?
The deaths of several gun runners turns up a connection to Prosecutor Lin. CSIC has 24 hours to process the evidence before charges are brought against him. Can their mentor be guilty of murder?
The CSIC team attempts to clear Lin's name in the murder of the three gunrunners. However when the true culprit is found out, the killer stages a deadly raid on the CSIC lab. Who will survive?
