- Growly Bear and Mary Rose do everything together. Until, one day, Growly Bear is left behind on a train. But he's sure that Mary Rose will come back for him. However, as the days turn to weeks and the weeks turn to months, Growly Bear's fur get worn, his eye comes loose and his Growl starts to fade. Then, a child picks him up! But it isn't the child he was expecting... Will Growly Bear ever find his way back to Mary Rose? Or will this be the start of his biggest adventure yet?