Lucy runs after the animals but is still missing hours later , when the animals have returned home by themselves .
A boy named Tom is playing make - believe by himself when his dog , Rex , chases his neighbour Lucy 's cat out of the house .
Lucy runs after the animals but is still missing hours later , when the animals have returned home by themselves .
A boy named Tom is playing make - believe by himself when his dog , Rex , chases his neighbour Lucy 's cat out of the house .