In the autumn of his days a distinguished privy councillor contemplates his past, looking back at the key moments of his life. A reluctant and indolent student, he recalls a chance meeting with a reclusive professor and his frustrated wife, which leads to his sharing their lodgings. In unlocking his thirst for knowledge, an ambitious and close relationship is formed between professor and student. But the professor harbours a secret which changes and sears both men for ever.