After 20 years, a man returns to the town where his brother was killed by a shark. When it resurfaces and kills again, the man goes on a mission to hunt down the predator, making unlikely alliances along the way, in order to stop it once and for all.

As the New Madrid Fault threatens to tear the U.S. in half, a desperate team of seismologists and government agents race to prevent disaster while the clock ticks down.