A baby whale is stuck under Tower Bridge and a giant ship is coming up the river that will squash him if Bella The Tower Bridge Cat doesn't rescue him. The Tower Bridge team have lots of fun and creative ideas to try and get the baby whale to swim back down the river - but Bella doesn't think the baby whale would like any of them. She realises the baby whale misses his Mum and thinks of a plan, it is dangerous and daring as the colossal cruise ship is getting nearer every minute! Just in time, Bella the Tower Bridge Cat rescues the baby whale spectacularly with the help of her friend, the famous acrobatic pilot Maya the Flyer and the baby whale is reunited with his Mum who is waiting out at sea for him.