Given the question: I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: A Prize of Arms Movie plot: Three criminals have hatched a plan to rob an army barracks. The troops are about to be dispatched to take part in a war in the Middle East and there is believed to be a large amount of pay on the premises, to be shipped out with them. The gang enters an army barracks, disguised as soldiers and proceeds to the pay corps headquarters where, under the guise of maintenance work, they make sure that the alarms are disabled which will give them time to make their escape once the robbery takes place. For the rest of the day they try to integrate themselves into the workings of the base, including being vaccinated for Overseas service, to avoid attracting attention. As night falls, they change into military police uniforms and head for the pay headquarters again, announcing on arrival that they have had reports of a fire. They begin searching the rooms. Starting a small blaze, they then order the premises to be evacuated. With the building empty, they break into the safe and steal over 100,000. Starting several fires to cover their activities, they then withdraw, carrying a fake casualty in a stretcher. As troops rush in from across the base to put out the fire, the men drive off to a secluded spot on the base where they had left an army truck. When an officer rings up the medics to check on the progress of the casualty, he is told nobody has arrived. Suspicious, he raises the alarm, and the whole camp is put on standby while the police are sent for. They are initially fooled into thinking the criminals have already left the camp. Meanwhile, the crooks successfully manage to escape the camp by tailing onto the end of a convoy. As the authorities slowly awake to what has happened, military police are dispatched after the convoy. After the truck leaves the convoy, it is tracked down by the army, with the criminals seemingly cornered in a disused country barn. They try to make a break for it, using a flamethrower to clear their path. Initially successful, they manage to outrun the troops, before their truck explodes. My question: What time of day does the gang head into the camp?
The answer is:
At night