Marty is trapped down a cave beneath the Welsh mountains. Will his life begin at forty - or will it end?Newly single and reunited with old friends from university, Marty finds life is no longer as idyllic as his memories of hot summers, music festivals and recreational drugs. He is persuaded to resume his hobby of caving, and, while twisted relationships play out on the surface, he descends into the strange and beautiful world of caverns and stalactites, where ghosts from the past are waiting to haunt him. But the others have secrets too - and as they are revealed, Marty unknowingly walks into danger.Cave is a coming of age adventure, spanning twenty years of friendships and relationships. Set in Wales at the turn of the millennium.