Allen Strange is excited about tagging along with Robbie and Josh on a trip to San Diego. Even the ride down is amazing -- they don t have trains back on Xela， Allen s home planet. But while they re sight-seeing， Allen senses some weird energy waves， almost like the detonation frequency for a Trykloid dark energy bomb.Allen and Josh soon find the signal s source， and discover it s linked to a shipment of torpedoes that sank in the San Diego Bay during World War II -- torpedoes that are now active!Time is running out， but Allen can t diffuse the torpedoes without absorbing their energy himself. And not even a Xelan can contain that much power without risking his life.So which will it be? The end of a major metropolis?Or the end of Allen?