A massive rip in the fabric of space and time leaves Space command's deep space fleet stuck on the other side of the rift. Meanwhile alien ships from another dimension arrive on Earth en masse on the other side of the divide. Captain Maguire, a decorated graduate of the Space command academy, whose unorthodox approach to duty is also his strength in a desperate bid to defend commands his starship the Sandawana into the rift in a desperate bid to defend Earth. 
Arriving on Earth he initiates the counter attack to repel the alien ships from Earth.  Other starships of  Space command's deep space fleet arrive on Earth to support the Sandawana's fight against the alien ships. Under the vicious barrage of lasers and missiles from Space command's deep space fleet, the alien ships begin to withdraw to their own dimension. But as they retreat the aliens launch a ground operation and take a senior Space fleet officer captive. 
Captain Maguire is forced to pursue the aliens taking the fight to their home world.

Interdimensional, a starship trilogy

"Do you really think that Space command is unable to explore more of space beyond the known regions?", challenged captain Lucinda. 


"What are you trying to say?", asked captain Maguire. 


"I 'm saying there is a reason why starships are kept busy patroling 'the borders' of known space. You see captain, there are forces out there far greater than just your odd alien encounter". 


"You 'll have to do better than that to do better than that to convince to deploy the shield", said captain Maguire. 


"I can give you one thousand seven hundred reasons", countered captain Lucinda. 


"The complement of the Sandawana's crew", just how low can you sink?", charged captain Maguire. 


"Captain we shall be leaving known space in exactly 20", reported lieutenant Tashinga at flight control. 


"Perch me through to the Sandawana's public address system", captain Maguire ordered lieutenant Tanaka at communications. 


Standby