Sent into a drunken tailspin when his entire unit is killed by a gang of thrill-seeking punks, disgraced Hong Kong police inspector Wing (Jackie Chan) needs help from his new rookie partner, with a troubled past of his own, to climb out of the bottle and track down the gang and its ruthless leader.

Both leads give performances that go beyond their usual range in a satire that’s sometimes diverting but ultimately toothless. Entertainment veteran Shirley Yung, who directs, should know better

Ng Kau Sau was once Queen in badminton, she gave up herself after being expelled from the sport. One day she met a brunch of terrible weirdoes: the Drunken Master who was lying on the ground, one-armed Lam Chiu, visually-impaired Ma Kun, and the scar-faced boss Lau Dan who suffered from loss of hearing. They were the most notorious robbers 10 years ago, but they decided to be good men after they got out from jail and formed the “Lau Dan Badminton Club”. Sau was impressed by them and decided to join Dan and practice seriously and go to the competition together.