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.

Miu (Ekin Cheng) grew up on Temple Street, where most of the gangsters in the area gathered, but he never hung around with them. When he accidentally kills a mobster he is imprisoned, and his life is changed forever. Upon his release, everything around him is different. He is now stuck in the sinking pit of the triad influence, and can neither escape from the merciless killings of the underworld, nor run away from the traps of the ordinary world. The only thing in his life that stays the same, is his love Sue. But is that enough to keep him from going over the edge?

Three flatmates share a luxury flat. A philandering hairdresser meets his match. A young stockbroker meets his boss's soon-to-be-ex-wife. A pregnant lady unsure over the identity of the baby's father.

In 1936 China, a nearly bankrupt drama troupe starts performing in a burned-out theater where the great actor Song Danping was killed. One of the actors, Wei Qing, starts seeing strange apparitions that could revive his troupe and deliver him to the same fate as Song Danping.

Chicken Feet assists in running an honorable gambling den owned by the crippled Uncle Fan and his son Kit. Having previously tried to shut down the gambling den and take over by paralyzing Fan and framing Kit for another man's murder, ruthless local Triad boss, James goes a step further by murdering Fan. Driven only by money and the pursuit of two valuable 'Jade stones', James kidnaps Kit's daughter so he will surrender gambling in order for James to win the upcoming Championship.

A C.I.A. agent is assigned to go to Beijing to look for a hidden "treasure," which turns out to be a woman who has supernatural powers, and is the National Treasure of China.

A poor barefoot young man from the country arrives in the city to start work with the friend of his dead father.

After the murder of his parents and sister at the hands of the villianous gun-running billionaire Ray Lui, crack fighter pilot Yan vows revenge.