A thrilling novelisation of a classic TV adventure for the Fourth Doctor and Sarah Jane Smith. 

In the snowy wastes of blizzard-swept Antarctica, a strange pod-like object is unearthed, buried deep in the ice. Curiosity turns to alarm as the pod begins to grow - then horror when suddenly it cracks open and a snaking green tendril shoots out, mercilessly seeking the nearest live victim. 

In London, botanical experts are bewildered, and the Doctor is called in to fight this unknown horror. But will he be in time to save Earth from the rapidly spreading tentacles of the Krynoid, a giant man-eating monster from an alien world?