27 weeks of police academy training, Li Bo Alice a public school police finally passing out of. The two Police Cadet is assigned to the Yau Ma Tei district the same squad, to become a real police officer. Bo Alice can become inspectors, as soon as possible in order to repay his late father and take good care of the grandfather. Bo Alice adherence to the Police General Orders as soon as possible promotion, and everything by the book does not aim at, but they try. The Liwen because character than Bo Alice is more impulsive, the definition of a good cop is different, so also different ways of doing things. A Bo Alice patrol intercepted a group of Guhuo Zi, the results because of the lack of experience, Guhuo Zi leader Heights teasing to know what to do, the results afterwards also the Heights of men silly complaints, Bo Alice to accept the police internal investigation . Bo Alice for this to heart, afraid of the incident has put on record that affect the promotion prospects. A drop more, Margaret Lin and Li happened to encounter Heights, silly and other people acting suspiciously, it took Liwen track Heights, etc., I hope Heights silly strong the evidence against. When Bo Alice is on duty, found that the two actions, Liwen to already be too late, saw Margaret Lynn is stupid strong shot dead lying unconscious on the ground ...... witnessed Margaret Lynn was shot dead, Bo Alice dealt a heavy blow , for a time confused can not accept what happened. Bo Alice intolerable to Liwen outbreak, that Liwen for the death of Margaret Lynn bear full responsibility for Bo Alice want to solve the case so will trace the band to go with Margaret Lynn Heights and other as Liwen heart red, two human secretly had a grudge. Six months later, Li Bo Alice is still the uniformed officers of the Yau Ma Tei district, Heights is short and art is original, six months ago, Bo Qiao Li Wen encountered as an undercover agent and has now done a great so was promoted to sergeant and transferred to two people ring the head of the uniformed patrol squad, becoming the boss of the two. Usually the most police officers do a uniformed squad patrolling officers for more than a year, will be selected into the PTU trained as a "blue hat", but Bo Alice in six months after the boss to introduce ourselves to the camp, because into the Tactical Unit police officers promoted to a necessary condition. Heights because the new was promoted to sergeant, but also are required to undergo PTU new trained. Three people need to face a period of 12 weeks of rigorous training. Li Bo Alice in the squad struggled to compete for Tactical Unit police officers. PTU most emphasis is teamwork, Li-Wen, Bo Alice struggled to make to the squad's performance greatly affected, teach Heights was a great headache. Heights also could not bear to see the two brothers to repeat the mistakes of the day with Lee Sir in once the WTO to make two and talk to Bo Alice the day is not Liwen impulse so exhausted Margaret Lynn ... Later PTU involved actions, demonstrations, not only to break through the defense of the Tactical Unit, to Yiling this once enemies of good friends understand how precious everyone's friendship. Finally, the WTO action not only to make two and two become more understanding, a closer relationship between brothers. Legitimate trio become co-operation of the Tactical Unit squad, Bo Alice began to emerge when the scene of the death of Margaret Lynn, psychological counseling doctors let Bo Alice remembered the truth of the day Margaret Lynn died, Bo Alice I did not know how to deal with ...