DING SIU-KA and her three foster mothers operate a foot spa together. She is also an undercover officer working for CIB chief inspector HONG TO-HANG. CHEUK HOI is TO-HANG's colleague. He is suspected of corruption and the ICAC is carrying out investigation on him...

KA-KEUNG is released. He immediately goes to the foot spa with his subordinate CHEUNG MUK-WING for he wants to get back the account record and name list from SIU-KA...

MUK-WING is being cheated during betting. He tries to get back the money from his enemy but he is captured...

KA-KEUNG is invited by TAT-FU to attend a triad organization's banquet. As instructed by CHEUK HOI, SIU-KA brings a hidden camera with her to collect information but the camera is not working properly...

CHEUK HOI bursts into the hiding place with his subordinates but they fail to find SIU-KA and the others...

SIN-YAN suspects that CHEUK HOI is bribed by FOON-HEI and CHEUK HOI tries not to disclose the truth to her...

SIU-KA loses a lot of money and she tries to take the money back by making KA-KEUNG drunk. However, she is drunk as well eventually..

In order to capture TAT-FU, CHEUK HOI carries out investigation at the warehouse and he is embroiled in a gangster fight accidentally...

KA-KEUNG is beaten up by the gangsters fiercely and he believes that they are FOON-HEI's subordinates...

The drug trafficker who refused to collaborate with FOON-HEI is being killed in the detention house. FOON-HEI gains full control of Hong Kong's drug market successfully...

SIN-YAN is not allowed to continue her investigation on CHEUK HOI. She has no choice but to carry out investigation on HO-KAN instead...

SIU-KA is beaten up by FOON-HEI's subordinate and HO-KAN arrives to stop it. KA-KEUNG arrives to help as well...

Being cheated by WING-KUEN, SIN-CHING loses her home and savings. However, she blames CHEUK HOI for unmasking WING-KUEN...

WING-KUEN has come to a dead end and he decides to kill SIN-CHING by gas leak. CHEUK HOI arrives at SIN-YAN's home coincidentally and he rescues them with HO-KAN...

After getting information from all the undercover officers, CHEUK HOI decides to arrest FOON-HEI and the others when they are trafficking drugs...

FOON-HEI's son has died and he is very angry. He tries to vent his anger by attacking the traitors in the organization...

SIN-YAN and SHIU-LEUNG will be getting married soon but SIN-YAN discovers that SHIU-LEUNG is hiding something away from her...

On the way home, SIU-KA is drunk and she seizes the chance to declare her love to KA-KEUNG. SIN-CHING meets up with CHEUK HOI frequently and their relationship is getting very close...

In order to get some evidences, CHEUK HOI sneaks into the hotel to carry out eavesdropping but he is discovered by others...

In order to rescue SIN-YAN, HO-KAN falls down from a building with SHIU-LEUNG and he loses his consciousness...

FOON-HEI always visits the foot spa for a rest. SIU-KA discovers that he suddenly leaves hurriedly after receiving a mysterious phone call...

After framing CHEUK HOI, the spy in the police force takes over his investigation unit. The spy discovers that the undercover officers' information is protected by password in the computer and he threatens CHEUK HOI to give him the password or he will harm MEI-YIN...

SIU-KA and FOON-HEI are being attacked by their rivals on the street. CHEUK HOI sneaks into the police station to carry out investigation but the spy discovers him...

FOON-HEI wants to go travelling with SIU-KA and her foster mothers. SIU-KA discovers that FOON-HEI actually wants to run away...

FOON-HEI is captured by HEI-MEI's subordinates. HEI-MEI wants KA-KEUNG to show his loyalty by killing FOON-HEI with a gun. SIU-KA and her foster mothers arrive coincidentally..

SIN-YAN becomes CHEUK HOI's undercover officer to carry out investigation on 'Mr SUNG', the one manipulating all the criminal activities behind the scene...

When SIU-KA leaves the hospital, she discovers that MUK-WING is injured. She persuades MUK-WING to leave the gang. SIN-YAN introduces GA-BO's mistress to HO-KAN...

When the police try to capture KWOK CHING for investigation, he is suddenly missing. Since KWOK CHING is unmasked, SUK-WAN is losing support in the election and SIU-KA helps her by offering suggestions to resolve the problems...

All senior gang members suddenly arrive at HO-KAN's office to accuse KA-KEUNG and HO-KAN for cheating their money...

SIU-KA learns that KA-KEUNG's situation is getting bad. She tries hard to find supporting evidences for KA-KEUNG and she eventually helps him to overturn the court's decision...

SIU-KA is threatened by CHEUK HOI and CHEUK HOI brings her to the basement where KA-KEUNG is staying...