段五郎接到了研究所所长小岛博士的紧急电话。小岛博士声音颤抖，告诉他自己收到了一个恐吓电话，要求他必须交出一份绝密文件，否则将面临生命危险。段五郎立即答应帮助小岛博士，并约定晚上8点钟到他的家中详谈。

当夜fall至8点，段五郎准时来到小岛家的门前按铃，却没有回应。他注意到房间内灯光依然亮着，便无意中试探性地拧动了门把手，只见房门竟然大开着。段五郎犹豫了一下，但还是决定进去看看。

一推门而入，他发现房间里的小岛博士昏倒在沙发边，小岛的手旁边有一块散发药味的手帕。当他靠近查看时，小岛慢慢睁开了朦胧的双眼，摸索着自己的口袋后失声叫道：“完了，那份绝密文件被人盗走了！”

这时，小岛看了一眼手表，说：“应该是30分钟前的事，我一边观看电视节目，一边吃苹果，当听到门铃响起，我以为你已经来了，不料打开门却被两个男人用枪顶住，他们问我要那份文件。我装作不知情，他们就用手帕堵住我的嘴和鼻子，以后我就什么也不知道。”

果不其然，小島咬过的一半苹果正滚落在地板上，而电视机电源已断开。在场景中，这一切似乎指向了一个惊人的真相。而就在这个时候，Segment Five realized the truth behind the mysterious events. He picked up the apple from under the TV and examined it carefully, his eyes narrowing as he gazed at Dr. Island.

Dr. Island's face paled even further as Segment Five revealed his discovery: "It was you who sold out, Doctor." The evidence lay in the apple itself - a subtle change in color that betrayed its earlier freshness, suggesting that it had been bitten into much later than claimed by Dr. Island.

Confronted with this new information, Dr. Island's defenses crumbled and he confessed to staging the entire ordeal to cover up his own theft of the classified documents. The files were found hidden inside a large bag of cash concealed within an icebox in his home.

The true extent of Dr. Island's deceit was only fully exposed when Segment Five discovered that not only had he planned and executed this elaborate ruse but also hid incriminating evidence within plain sight through clever manipulation of seemingly innocuous objects like an apple.

In conclusion, this tale reveals how astute observation and logical deduction can uncover even the most cunning deception - all thanks to a simple yet telling detail: an apple left unattended on a floor where time seemed to have stood still for 30 minutes before being disturbed by none other than segment five himself who saw through dr island’s charade using nothing more than his keen senses & intellect!