Is this a good idea for a novel I might write?

Brad and Jasmine are both 13 year olds who live in Chicago, Illinois and attend Alexander Graham Bell School. Soon their history class takes a field trip to the Museum of Contemporary Art. When they get separated from their group, they wander around the museum. They bump into a security guard at the museum, Officer Leapis, who transforms into a bull and attacks them. They get saved by their history teacher Mr. Hedge and he takes them away from the museum, who explains to them that Officer Leapis was actually the Apis bull. He leaves the class with the assistant principle Mr. Chamberlain. He takes them to the Trump International Hotel and Tower to room 645. When they enter the room, it magically turns into three times it's original size. He tells them that his real name is Astiel and for them to call him this. Astiel tells them that they are the most powerful descendants of Egyptian gods. He tells them that Jasmine is the descendant of Isis and Brad is the descendant of an unknown but powerful god. Astiel also says that the Egyptian gods Isis, Osiris, Horus, Set and Nephthys all created a lair in which they all live that is on the top of Willis Tower. Astiel takes them to this lair (the Lair of the Gods). Horus tells them that his most powerful descendant Kevin has been captured by the god Maahes. He tells Brad, Jasmine, and Astiel that they have to save him with a deadline of twelve days. Isis also tells them that a dark force is emerging, and that they must stop this dark force before it is freed. Along the way, it is revealed that Brad is the descendant of the god Ra, and that Kevin was captured in order to give power to the god of chaos Apep (the dark force). It is revealed that Brad must stop Apep before he is freed but he needs the help of the five most powerful descendants to the main Egyptian gods, meaning he has to find the most powerful descendants of Osiris, Set and Nephthys.