Mr Mystery #7: The Mystery Of The Boy Who Never Was

Who is the mysterious Justen?
What is the secret of the ancient silver bowl?
Why is the vicious criminal called The Shark so desperate to steal it?
It’s a slow day for Alvin’s investigators… until they’re roped in to search for a stolen car. Meanwhile, Mars Wong turns suspicious when her rich friend, Sabrina Sim, falls for a guy named Justen.