1) Matthew has a strange nightmare about a monster chasing him in his college. Months later, he is experiencing strange noises and sights that seem related to his nightmare.
2) When Matthew returns home in a panic, his friend Will ignores Matthew's warnings and lets himself in. The monster attacks and kills Will.
3) Matthew finds the weakening monster in his bathroom. The monster, who calls Matthew "father", explains that it needs to return to the sewers to feed or it will die. Despite the monster's pleas, Matthew kills it.