As Grace Brothers is being redecorated, the management sends the staff on a paid holiday to the resort of Costa Plonka, on the Spanish coast. On the first night they think they are allocated 7 "penthouses" but it is in fact "tent-houses" outside the hotel - except for Mr Harman, who is given one of the hotel's luxury suites, much to the chagrin of the others.

After various misfortunes and misunderstandings, they narrowly survive a gunfight between the revolutionaries and government troops. They are saved by a group of tanks that arrive on the scene; these prove to have been commandeered by Young Mr Grace, who wanted to visit his beleaguered underlings, but could not find a taxi.