i need ur help in understanding that series resonant ciruit. the one given in this ebook

it has a voltage source, an inductor and a capacitor all connected in series. what i dont get is the operation of this circuit

this book explained the parallel resonant circuit very well but with series it just said that impedance drops to zero when reactances of capacitor and inductore becomes equal and current becomes extremely large

can anyone explain how does this all happens. what actually happens in the circuit. i am a basic level student so would appreciate if answer is at basic level with more details