Laing meets fellow tenants Charlotte Melville, a secretary who lives one floor above him, and Richard Wilder, a documentary film-maker who lives with his family on the building's lower floors. Life in the high-rise begins to degenerate quickly, as minor power failures and petty grievances among neighbours and between rival floors escalate into an orgy of violence. Skirmishes become frequent throughout the building as whole floors of tenants try to claim lifts and hold them for their own. Groups gather to defend their rights to the swimming pools, and party-goers attack "enemy floors" to raid and vandalise them. The lower, middle, and upper floors of the building gradually stratify into distinct groups.