Tiffany Lau

Former friends Kwok Pak Fei, Keung Hei Man, and Lau Lik reunite years after a botched operation led to a tragic death and estrangement. Now, a gruesome murder case tied to a human trafficking ring forces them to work together. As they investigate, mysterious messages appear with clues about the crimes, hinting at knowledge from the future. Together, they form a special unit, ASIB, to decode these messages and solve the chilling case.

Cheung Fei Fan, Ha Tin Hang and Ho Tit Nam are brothers who have been separated for many years. When the three were young, their lives scattered because of financial turmoil. When they grew up, they reunited and found that there was a great conspiracy in the past.