美国里士满艺术学院的大学生杰克是个探险谜，他早就从媒体上听说了波哥大城附近“魔鬼旅馆”的事情，便决定利用暑假和植物学教授哈丁博士结伴前往考察。
到达目的地后，杰克和哈丁见到这座旅馆掩映在淡淡雾霭中，似乎被笼罩上一种极为诡异、阴森的色彩。两人各自订好房间后，就暂时分开了。杰克进到自己房间，见墙上挂了一个古老的钟，下面贴着一张纸，上面是提示语：此钟将准时在午夜12点自动敲响，提醒您和鬼魂约会；如果您害怕了，可以按动下方的开关，防止它敲响，就能避免鬼魂出现。
小憩后的杰克醒来时，已是接近半夜10点。恰好哈丁也是夜不能寐，两人便一起去旅馆旁边的树林里散步。
在幽静的林子边缘，两人闻到一股淡淡的香气。哈丁激动地告诉杰克，这是一种叫卡美兰花的灌木植物发出的。这种植物在世界上非常罕见。
初遇鬼魂
两人随便聊了一阵后，杰克便先回去了。他来到自己房间，见指针已经指向午夜12点，门外忽然响起了笃笃的敲门声。
杰克正满心惶惑之际，门一下子被撞开了，一个巫婆模样的人跳了进来，狞笑着说：“你知道吗？100年前，这里死了一个女祭司，她的冤魂不散，每晚都要出来作祟。”说完，巫婆似乎按动了身上的什么旋钮。随之，一道幽幽的绿光罩住了她的脸，同时，她的舌头伸得老长，眼睛里射出杀气腾腾的寒光。惊惧得头皮发麻的杰克夺路而出向旅馆外逃去，巫婆一边发出凄厉的尖叫，一边紧追不舍。
杰克一口气跑进树林里，天空不知何时飘起了细雨。忽然，他听到了歌声，杰克突然惊诧地发现周围的树枝渐渐地发出一团团荧光，它们时而白，时而绿，飘忽不定，就像黑夜墓地里的鬼火。
一阵冷风再次拂过时，他居然看到了这“光的世界”里隐藏着一个个面目狰狞的魔鬼。杰克不禁倏地发起毛来：大概自己撞进地狱里了吧！
杰克再也待不住了，他飞快地向别处逃去。黑暗中，他顾不得辨清方向，只想着尽快离开这个是非之地！但是他很快发现，一路上“妖魔鬼怪”丝毫没减少，而且都在紧追着他不放。杰克发现此时自己全身上下也发出阵阵绿光，他慌不择路地刚拐过一个弯，突然看到离自己最近的一棵大树后闪出一个怪物，竟是头发、眉毛、眼眶上都发出荧荧绿光的老巫婆向他扑来！没等杰克反应过来，老巫婆已发出一声尖叫，扑倒在杰克身上！
“啊──”杰克惊叫起来。老巫婆一下子跳起来，转身就跑。杰克再次惊愕地发现，周围的荧光慢慢变淡，鬼怪们也随之消失得无影无踪了。杰克跌跌撞撞地回到旅馆。
真假鬼魂
第二天，杰克醒来时，已是日上三竿。他决心向旅馆服务人员弄清楚那一切究竟是怎么回事。当杰克来到大厅里时，见到哈丁博士正在和旅馆主人桑迪饶有兴致地聊着什么，一个老妇人垂手站在旁边。
杰克诉说了昨夜的不寻常经历后，桑迪解释说：“实在对不起，让您受惊了。不过，本旅馆的特色就是鬼服务。在这里，尤其是夜间，会随时随地地撞见各种鬼怪，但它们都是人为装扮的，比如她……”桑迪说着，用手指了指身旁的老妇人。
“哦，先生，我就是昨夜扮成巫婆模样惊扰你的人，你不会介意吧！”老妇人边说边做了一个伸舌头动作。
“原来是这样。”杰克总算长长地出了一口气。就在这时，那老妇人却心有余悸地说：“昨夜还发生了另外一件奇怪的事。你消失在林子里后，我就钻进去寻找，不料发现林中真的闹起了鬼。我撞见了一个浑身闪着绿光的怪物，我一时没收住脚步，把它撞倒了。那怪物大叫一声，我吓得差点儿灵魂出窍。”
杰克一听，哭笑不得：“那个怪物就是我！我也奇怪当时自己的身上怎么会发出绿光？”哈丁听了在一旁补充道：“杰克老弟，昨天夜里我们散过步后，你先回去了，我却一直在旅馆周围转悠，再度走到那片树林时，信口哼起了民歌。但是后来，我也看到树林里闹鬼了。”杰克笑了：“唱歌的是你啊！”
“可是，树林里为什么会突然出现鬼怪呢？”杰克问哈丁和桑迪。桑迪说，他也弄不清其中的原因，不过这种恐怖的事情在100多年里已发生过多次了。哈丁仔细询问了情况后，似乎胸有成竹地说：“问题也许出在你们的衣服上。”杰克和老妇人低头仔细观察，各自的衣服上果真粘附有不少淡黄色粉末的小颗粒。
鬼魂真相
杰克、哈丁和桑迪一起来到树林里，那里生长着一些低矮的卡美兰树。哈丁取下一些花粉，它们确实与杰克身上的粉末一般无二。接着在桑迪的帮助下，他们查看了旅馆保存的100多年里关于那片树林闹鬼的记录，发现它们有如下共同点：见到鬼都是先在树林里，而后见鬼的人觉得自己也仿佛变成了鬼；闹鬼的时间都在午夜12点和1点之间，但每次不超过10分钟，而且都发生在卡美兰树开花的这半个月里；闹鬼前白天为晴天，而夜里下过小雨。
在桑迪的支持下，他们迅速与波哥大城国家科学研究所取得了联系。借助研究所的先进设备与技术，哈丁用保温薄膜把一株卡美兰树封闭起来，并且人工创造出闹鬼那天夜里的空气温度、湿度，模仿小雨向树喷水。待一切条件都吻合后，果然，哈丁博士惊异地发现，卡美兰树上的花渐渐发出了一团团时白时绿的荧光，而且绿光越来越多，乃至连成一片，简直成了奇幻的世界。
哈丁又启动了鼓风机，看到那些绿光随风漂浮，花粉也不断地下落，一旦落在人的身上，人就自然发出可怕的绿光。哈丁激动地对人们说：“大片的绿光正是这种花粉发出的，由于风吹树动，这些光便不断变幻，再加上人的想象，它们就成了可怖的鬼怪模样了。同样，由于心理暗示作用，人在逃跑时，会觉得它们在追自己。”同时，哈丁博士再对卡美兰树根部附近的土层进行化验，得出结论：土壤中含有大量的荧石，被根部吸收后能够转化为荧光素，而荧光素的特点是能够在晴天吸收光照，并在特定的温度、湿度等条件下可以在黑暗中释放出白天吸收的光。当然，如果不具备这些必要的条件，荧光素就不发光，就不会产生闹鬼现象了。
Introduce:The undergraduate of institute of American Li Shiman art Jackie is an expeditionary mystery, he goes up early from media heard wave elder brother is big near the city " devil hotel " thing, before deciding to use accompany of summer vacation and botanical professor Dr. Harding, go to make an on-the-spot investigation. After reaching destination, jackie and Harding see this hotel sets off one another to mist in light mist in, be enveloped to go up it seems that a kind of very weird, ghastly colour. After two people book good room severally, parted temporarily. Jackie enters him room, saw an old bell is hanged on the wall, there is a piece of paper below, clew language is above: This bell will be punctual knock automatically at 12 o'clock noisy in midnight, remind you and soul appointment; If you feared, can press the switch that uses lower part, prevent it to be knocked noisy, can avoid soul to appear. Small when the Jackie after resting awakes, already was to be close to midnight at 10 o'clock. Apropos Harding also is night cannot sleep, two people take a walk together. In peaceful grove brim, two people smell a light aroma. Harding tells Jackie excitedly, the plant gives out a kind of bush that calls Kameilan the flower this. This kind of plant is very infrequent on the world. Soul is encountered first after two people talked about casually, jackie went back first. He comes to him room, see pressing with a finger has pointed to midnight at 12 o'clock, earnest earnest rang suddenly outside the door knock sound. During Jackie is having one's heart filled with perplexed and alarmed, the door was swung open at a draught, the person of about of a hellcat jumped, fleer wears say: "Do you know? 100 years ago, a priestess died here, her bad luck fetch does not come loose, should come out every night cause trouble. " say, hellcat presses the what knob that moved a body to go up it seems that. Subsequently, a faint green light covered her face, in the meantime, her tongue is extended so that often grow, combative cold light is shot in the eye. Jing dread gets scalp to the Jackie of pins and needles seizes a road and go out to go to hotel flee to other country, hellcat gives out sad and shrill shriek at the same time, chase after closely at the same time do not abandon. Jackie runs into the woods at a heat in, the sky did not know when to hike up drizzle. Suddenly, he heard singing, the branch all round discovery of abrupt amazed ground gives out Jackie gradually posse group is fluorescent, their from time to time is white, from time to time is green, rove, resemble the jack-o'-lantern in night graveyard. An air cooling again stroke outdated, he saw this unexpectedly " smooth world " in under cover each sinister in appearance devil. Jackie can'ts help swiftly ground initiates wool to come: Probably oneself bumped into hell! Jackie also is not waited for again, he is rapid the ground to escape somewhere else. In darkness, he is considered do not get differentiate clear way, wanting to leave the ground of this dispute as soon as possible only! But he discovers very quickly, all the way " demons and ghosts " a bit did not decrease, and chasing after him closely to be not put. Jackie discovers this
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