The Tower Treasure, by Franklin W. Dixon, is the first book in his popular Hardy Boys series. The main characters are Frank and Joe Hardy, the teenage sons of a detective named Fenton Hardy. Frank and Joe are amateur detectives, following in the footsteps of their father. Throughout the series, the Hardy boys solve mysteries and help bring criminals to justice.
In this book, Frank and Joe are riding their motorcycles when a speeding car suddenly approaches them from behind and narrowly misses them. The car is traveling too fast for them to read the license plate number. However, they are able to notice that the driver had a “shock of red hair.” A little while later, the Hardy boys find out that their friend’s car has been stolen, and they suspect that the thief is the same person who nearly hit them on their motorcycles.
Soon afterward, they learn that forty thousand dollars has been stolen from a place called the Tower Mansion. The Tower’s owner strongly believes that its caretaker, Henry Robinson, committed the crime. Henry Robinson’s son is a friend of the Hardy boys, and they believe that Henry Robinson is innocent. The Hardy boys believe that the man who stole their friend’s car must have also stolen the forty thousand dollars. They need to prove their theory to clear Henry Robinson’s good name.