Tuck, Munch and Alex are life-long buddies who are about to make an out-of-this-world discovery. Their neighbourhood is being destroyed by a highway construction project and they must all move to different towns. But just two days before they must part ways forever, they begin receiving strange signals on their phones. Convinced these signals are signs of extra-terrestrial life, they begin the hunt for their source. What Tuck, Munch and Alex discover is beyond their wildest imaginations: a small, cute, energetic alien who has become stranded on earth.

They name their new friend Echo...and now they must undertake their biggest adventure ever helping Echo find his way home. In a race against time and with certain adults trying to foil their e very move, this is one journey that will touch their hearts in unexpected ways and change their lives forever.