Three astronomers accidentally intercept what they believe to be a signal from a distant alien civilisation, but the truth is even more incredible than any of them could have imagined.

A zealous cognitive psychologist stumbles across an unbelievable discovery - a way of communicating with the other side. His joy is short-lived, however, as his daughter is put into potentially grave danger and when all leads go cold, he takes matters into his own hands to find out the truth.