Tony Chow Kwok-Chung

In 1985, Cheung Yau-ming was one of five miscreants involved in the brutal murder of a white couple. As he was still a juvenile, the court ordered that he be "detained at Her Majesty's pleasure," a clause in British law allowing the government to imprison young offenders for an indefinite period. The film picks up in 1997, with Yau-ming (now 28) being paid a visit by a girl named Cheung Yue-ling. With only six months to go before the Handover, Yau-ming and 22 other prisoners hope to have their sentences determined soon, fearing what might happen should the decision about what to do with them become the province of incoming Chief Executive Tung Chee-hwa.

The "walk in" of the title refers to one person allowing another's soul to take possession of his body at the time of death.

When an honest company employee is falsely accused of being an accomplice to a robbery, and his wife dies through police incompetence, he seeks revenge by launching a one-man crime spree, starting with the abduction of his former boss's spoiled daughter. But she soon begins to understand his motives, and becomes his lover and willing accomplice.