Tobias the Hybrid Tram Engine's sense of identity is thrown into question when a mysterious enemy returns to the railway with a hidden agenda and throws everyone's lives into chaos. Tobias the Hybrid Tram Engine's sense of identity is thrown into question when a mysterious enemy returns to the railway with a hidden agenda and throws everyone's lives into chaos. Tobias the Hybrid Tram Engine's sense of identity is thrown into question when a mysterious enemy returns to the railway with a hidden agenda and throws everyone's lives into chaos. Tobias the Hybrid Tram Engine's sense of identity is thrown into question when a mysterious enemy returns to the railway with a hidden agenda and throws everyone's lives into chaos.