Mark has always been the outsider, the office geek nobody looked at, least of all popular attractive Louise. But now he's got his girl. Everybody smirked when he bought a flat with a bunker in the garden dating from the cold war 1980s. But now he's the one laughing - when Louise wakes up and discovers she is in the bunker and Mark has saved her life. Indeed, they may be the only two people left alive after a nuclear attack. But it is not long before the tinned chilli is running out, Louise is refusing to play Dungeons and Dragons and Mark's patience is wearing thin. Soon he is withholding food from her, in her "best interests".
Imagine Lord of the Flies for two people crossed with John Fowles's The Collector and you have something of the flavour of Dennis Kelly's latest, a disappointingly conventional psychological thriller about power and its abuse that lacks the quirky individuality of his previous work.
Roxanna Silbert's blistering production, played out on Miriam Buether's clever, claustrophobic set, covers up the deficiencies in writing and plotting, and Tom Brooke is terrific as Mark. But it won't keep you guessing for very long.
· Until August 28. Box office: 0131-228 1404.
