A group of bored, disaffected New York City teenagers spend a day skating, smoking, drinking, partying, deflowering virgins, and getting into fights.

When an inner-city Miami schoolteacher gets her knee broken after standing up to the school's gang leader, her mercenary combat specialist boyfriend goes undercover as a substitute teacher to take down the punk. Soon he discovers a conspiracy of criminals at work, and must reassemble his team from his last jungle raid to stop them.

When teacher Randall Thomasson is killed during a carjacking, an unexpected visitor shows up at his funeral - his estranged brother, Karl Thomasson. An ex-Green Beret turned mercenary, Karl signs on as a new substitute teacher in order to investigate Randall's murder.

A tough, Jewish ex-con just released from prison crosses a powerful drug dealer and former prison rival in his return to a life of crime.

Jason and Midget are two young, black teenagers living in Newark, New Jersey, the unofficial car theft capital of the world. Their favourite pastime is that of everybody in their neighbourhood: stealing cars and joyriding. The trouble starts when they steal a police car and the cops launch a violent offensive that involves beating and even shooting suspects.

At the beginning of a nightly Alcoholics Anonymous meeting, Jim seems particularly troubled. His sponsor encourages him to talk that night, the first time in seven months, so he does - and leaves the meeting right after. As Jim wanders the night, searching for some solace in his old stomping grounds, bars and parks where he bought drugs, the meeting goes on, and we hear the stories of survivors and addicts - some, like Louis, who claim to have wandered in looking for choir practice, who don't call themselves alcoholic, and others, like Joseph, whose drinking almost caused the death of his child - as they talk about their lives at the meeting