Soon... it's been 6 yrs later that, finally a mutant from the river has appeared and eating people... meanwhile, it has captured alive a food stall owner, Gangdu's daughter Hyunseo. Upset, believing that Hyunseo must have been dead, Gangdu and his family members (Gangdu's dad, younger brother - Namil, and sister - Namju) are later caught up in a difficult suitation as all people in contact with the mutant and those people are suspected to have infected with fatal virus attack. However, the family escaped from the hospital after receiving a call from Hyunseo.
They family is quite brave to infiltrate the forbidden zone near the Han River. However, in the progress, Hyunseo's grandpa died at the hands of the mutant. And, stupidly enought Gangdu got caught and undergoes terrible investigation and research. Just as Gangdu is suffering, Namil finally knows Hyunseo's whereabout. However, while escapsing from the police, he has fallen from a ridge and he managed to sms Namju about Hyunseo's location. Meanwhile Namju is hidden near the Han river and been searching for Hyunseo. Soon after she recieved the msg, she rushes off to the sewer. Namju has confronted the mutant and luckily she was knocked down to a place where the mutant can't reach...
Soon, Namil awakens. He is ready too, to set of and burnt the ugly monster. Meanwhile, Gangdu escapes from the research lab and headed down Han river. However, when he reached the sewer, Hyunseo is already eaten by the mutant. Like a madman, he runs after it. And... finally the three siblings met. Combined force, they managed to kill the monster. However, Hyunseo is dead. While pulling her out from the mouth of the mutant, there is still a little boy surviving from the deal...
Some pics from The Host.

The family guarantinee at the hospital.

Gangdu, Namil and their father after the mutant.

Namju aiming at the mutant but later got hit down.

Namil preparing to burn down the mutant. But, he dropped the last bottle...

The last shot by Namju to bring the mutant down.
Franky speaking, this movie is worth ****/5stars. Mutant sudden pops out & then suspense ceased by comical effects of the family. Quite worthy to catch it.
That's all.