One night, Horsey and Moo-moo Cow climb out of the baby's cot and set off on a big adventure. But at every turn, they come across a daunting obstacle. Each time, Moo-moo Cow timidly suggests that they turn back, but the indomitable Horsey insists that they forge on - out of the front door, across the garden and through the open gate to the Big Wide Road...