A family of space aliens crash lands on Earth when their spaceship conks out.

Lonnie and Rick seem to be complete opposites, at first glance. A survivor of suicide, Lonnie is introverted and ill at ease around her parents, Lois and Harvey. Rick, meanwhile, is sunny and charismatic. But appearances can be deceiving, as their families learn when the teens begin a romance. Upset about Lonnie's influence on Rick, his parents forbid the pair to see each other -- with tragic consequences.

Police chief Brody must protect the citizens of Amity after a second monstrous shark begins terrorizing the waters.