On my own, in my house. But I was alone, so I have nobody to verify that.
And where were you at 2am?
Arthur Godwinson (owner of a large estate)'s body is found dead at 3.01 in the morning outside the front door of his estate house. He is found by the maid, after the sound of the dog barking at the body woke her. Wounds prove that he was stabbed, but there is no knife at the crime scene.
Detective discovers Jack Kemble owes Godwinson £10,000, but cannot pay it, due to being made redundant. At first, he tried to hide this fact but later said the only reason he held back the information was because he was embarrassed. At the time the murder was committed, 2am, Kemble was seen at the local pub by several people.
Godwinson had a son who would inherit his estate when he died. It would be enough to make him very wealthy. In addition, he had no alibi for 2am. When questioned, he said he would never kill his father for any amount of money, but he remains main suspect.
The only significance the police can find with the night of the murder was the fact that is was the night of the clocks going back. However, they fail to find a way that this could be connected to the murder itself. They find the murder weapon in a nearby bush, but due to rain, no fingerprints can be found. A footprint matching Kemble's shoe is found, but he claims he was just walking by earlier in the day.
Godwinson was hated in the village. He had a reputation of being very selfish with his wealth and for a while, people wanted rid of him. Also, if the villagers worked together, they could justify each other's alibis falsely and lead the police to wrong conclusions. However, the detectives think there is something significant about the fact the murder is committed at the very time the clocks go back.
The detective finally realises the hour of 2am has two hours instead of one, as the clocks went back. This leaves Kemble with no alibi. After Kemble attempts to leave the country, he is found by the police and arrested. Godwinson's son is released from custody after Kemble admits his innocence during the trial.