Dennys, recovering from severe sunstroke, lives with Noah in his tent. Sandy lives with Noah's father, Grandfather Lamech, in his tent. The twins experience many things during their stay. They encounter unicorns which can heal pain with light from their horns. Amazing beings called Seraphim help Noah and his family.
Seraphim look like they are half human, half angel.
They each have the power to transform into certain creatures. With the Seraphim, Sandy and Dennys help Noah and his family with their problems and personal struggles. Sandy and Dennys also meet Yalith, Noah's beautiful daughter. Together, Noah's family prepares for the flood with the twins' help. Soon, the twins are treated as part of Noah's family.