The presence of a malicious stranger threatens to destroy the peace and harmony of a vacationing executive's family life.

When Nube and his class arrive at a small island to carry out beach activities, they heard a forbodding tale from an old man residing on the island. Legend has it that there is a creature known as the sea spider in the open seas around the island. When the creature is past 200 years old, it will turn into a monster and devour humans to satisfy its appetite. However, curiousity kills the cat and Yukime decides to pursue the authenticity of the legend. And then, a girl suddenly appears on the beach. Possessed with a strange charm, she immediately attracts Hiroshi's attention and overcomes him. Soon later, strange things start to happen to the others whereby Kyoko and Ritsuko-sensei got attacked under strange circumstances. The true identity behind the mysterious girl is questioned and the legend behind the sea creature seems to be true after all.

A country family of five take in charming cousin Julie, whose parents recently died in a car crash, though teenaged daughter Rachel grows suspect that she has an alternative agenda; one that possibly includes witchcraft.

Six friends rent a cabin in the middle of the woods on the last weekend of summer and set out to have an amazing time full of partying and drinking. Little do they know that they will be sharing this cabin with an unexpected guest, will they make it out alive?